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1286130 = 23543997
BaseRepresentation
bin100111001111111110010
32102100020110
410321333302
5312124010
643322150
713634436
oct4717762
92370213
101286130
117a931a
12520356
13360531
142569c6
151a6120
hex139ff2

1286130 has 32 divisors (see below), whose sum is σ = 3161664. Its totient is φ = 334656.

The previous prime is 1286119. The next prime is 1286147. The reversal of 1286130 is 316821.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1286097 and 1286106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 792 + ... + 1788.

It is an arithmetic number, because the mean of its divisors is an integer number (98802).

21286130 is an apocalyptic number.

1286130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1286130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1580832).

1286130 is an abundant number, since it is smaller than the sum of its proper divisors (1875534).

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

1286130 is a wasteful number, since it uses less digits than its factorization.

1286130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1286130 is about 1134.0767169817. The cubic root of 1286130 is about 108.7497555814.

The spelling of 1286130 in words is "one million, two hundred eighty-six thousand, one hundred thirty".

Divisors: 1 2 3 5 6 10 15 30 43 86 129 215 258 430 645 997 1290 1994 2991 4985 5982 9970 14955 29910 42871 85742 128613 214355 257226 428710 643065 1286130