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1289394 = 23271633
BaseRepresentation
bin100111010110010110010
32102111201100
410322302302
5312230034
643345230
713650111
oct4726262
92374640
101289394
11800817
12522216
13361b72
14257c78
151a7099
hex13acb2

1289394 has 12 divisors (see below), whose sum is σ = 2793726. Its totient is φ = 429792.

The previous prime is 1289381. The next prime is 1289401. The reversal of 1289394 is 4939821.

It can be written as a sum of positive squares in only one way, i.e., 1238769 + 50625 = 1113^2 + 225^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35799 + ... + 35834.

21289394 is an apocalyptic number.

1289394 is an abundant number, since it is smaller than the sum of its proper divisors (1504332).

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

1289394 is a wasteful number, since it uses less digits than its factorization.

1289394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71641 (or 71638 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 1289394 is about 1135.5148611973. The cubic root of 1289394 is about 108.8416745807.

The spelling of 1289394 in words is "one million, two hundred eighty-nine thousand, three hundred ninety-four".

Divisors: 1 2 3 6 9 18 71633 143266 214899 429798 644697 1289394