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1290996 = 2232747109
BaseRepresentation
bin100111011001011110100
32102120220200
410323023310
5312302441
643400500
713654560
oct4731364
92376820
101290996
11801a43
12523130
13362805
142586a0
151a77b6
hex13b2f4

1290996 has 72 divisors (see below), whose sum is σ = 3843840. Its totient is φ = 357696.

The previous prime is 1290983. The next prime is 1291001. The reversal of 1290996 is 6990921.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1290996.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11790 + ... + 11898.

21290996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1290996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1921920).

1290996 is an abundant number, since it is smaller than the sum of its proper divisors (2552844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1290996 is a wasteful number, since it uses less digits than its factorization.

1290996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 1290996 is about 1136.2200491102. The cubic root of 1290996 is about 108.8867324916.

The spelling of 1290996 in words is "one million, two hundred ninety thousand, nine hundred ninety-six".

Divisors: 1 2 3 4 6 7 9 12 14 18 21 28 36 42 47 63 84 94 109 126 141 188 218 252 282 327 329 423 436 564 654 658 763 846 981 987 1308 1316 1526 1692 1962 1974 2289 2961 3052 3924 3948 4578 5123 5922 6867 9156 10246 11844 13734 15369 20492 27468 30738 35861 46107 61476 71722 92214 107583 143444 184428 215166 322749 430332 645498 1290996