1256412356 has 24 divisors (see below), whose sum is σ = 2327445120. Its totient is φ = 592435872.

The previous prime is 1256412343. The next prime is 1256412383. The reversal of 1256412356 is 6532146521.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120956 + ... + 130931.

It is an arithmetic number, because the mean of its divisors is an integer number (96976880).

Almost surely, 2^1256412356 is an apocalyptic number.

It is an amenable number.

1256412356 is a deficient number, since it is larger than the sum of its proper divisors (1071032764).

1256412356 is a wasteful number, since it uses less digits than its factorization.

1256412356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251963 (or 251961 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 1256412356 is about 35445.9074647554. The cubic root of 1256412356 is about 1079.0562045070.

Adding to 1256412356 its reverse (6532146521), we get a palindrome (7788558877).

The spelling of 1256412356 in words is "one billion, two hundred fifty-six million, four hundred twelve thousand, three hundred fifty-six".