1256999060 has 24 divisors (see below), whose sum is σ = 2679099360. Its totient is φ = 495294624.

The previous prime is 1256999021. The next prime is 1256999063. The reversal of 1256999060 is 609996521.

It is a junction number, because it is equal to n+sod(n) for n = 1256998996 and 1256999014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256999063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467690 + ... + 470369.

It is an arithmetic number, because the mean of its divisors is an integer number (111629140).

Almost surely, 2^1256999060 is an apocalyptic number.

1256999060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1256999060 is an abundant number, since it is smaller than the sum of its proper divisors (1422100300).

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

1256999060 is a wasteful number, since it uses less digits than its factorization.

1256999060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938135 (or 938133 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 47.

The square root of 1256999060 is about 35454.1825459282. The cubic root of 1256999060 is about 1079.2241398376.

The spelling of 1256999060 in words is "one billion, two hundred fifty-six million, nine hundred ninety-nine thousand, sixty".