1256375351 has 16 divisors (see below), whose sum is σ = 1577836800. Its totient is φ = 971839680.

The previous prime is 1256375339. The next prime is 1256375363. The reversal of 1256375351 is 1535736521.

It is an interprime number because it is at equal distance from previous prime (1256375339) and next prime (1256375363).

It is not a de Polignac number, because 1256375351 - 2⁶ = 1256375287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256375321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49001 + ... + 70098.

It is an arithmetic number, because the mean of its divisors is an integer number (98614800).

Almost surely, 2^1256375351 is an apocalyptic number.

1256375351 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1256375351 is a deficient number, since it is larger than the sum of its proper divisors (321461449).

1256375351 is a wasteful number, since it uses less digits than its factorization.

1256375351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119254.

The product of its digits is 94500, while the sum is 38.

The square root of 1256375351 is about 35445.3854683512. The cubic root of 1256375351 is about 1079.0456106212.

The spelling of 1256375351 in words is "one billion, two hundred fifty-six million, three hundred seventy-five thousand, three hundred fifty-one".