1256369325 has 24 divisors (see below), whose sum is σ = 2078783616. Its totient is φ = 669552000.

The previous prime is 1256369287. The next prime is 1256369339. The reversal of 1256369325 is 5239636521.

It is a happy number.

It is not a de Polignac number, because 1256369325 - 2¹⁹ = 1255845037 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105420 + ... + 116730.

It is an arithmetic number, because the mean of its divisors is an integer number (86615984).

Almost surely, 2^1256369325 is an apocalyptic number.

1256369325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1256369325 is a deficient number, since it is larger than the sum of its proper divisors (822414291).

1256369325 is a wasteful number, since it uses less digits than its factorization.

1256369325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12805 (or 12800 counting only the distinct ones).

The product of its digits is 291600, while the sum is 42.

The square root of 1256369325 is about 35445.3004642364. The cubic root of 1256369325 is about 1079.0438854629.

The spelling of 1256369325 in words is "one billion, two hundred fifty-six million, three hundred sixty-nine thousand, three hundred twenty-five".