1256786292 has 48 divisors (see below), whose sum is σ = 2965636800. Its totient is φ = 414220800.

The previous prime is 1256786281. The next prime is 1256786347. The reversal of 1256786292 is 2926876521.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 447292 + ... + 450092.

It is an arithmetic number, because the mean of its divisors is an integer number (61784100).

Almost surely, 2^1256786292 is an apocalyptic number.

1256786292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1256786292 is an abundant number, since it is smaller than the sum of its proper divisors (1708850508).

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

1256786292 is a wasteful number, since it uses less digits than its factorization.

1256786292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216 (or 3214 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 1256786292 is about 35451.1818138691. The cubic root of 1256786292 is about 1079.1632441891.

The spelling of 1256786292 in words is "one billion, two hundred fifty-six million, seven hundred eighty-six thousand, two hundred ninety-two".