1256948351 has 12 divisors (see below), whose sum is σ = 1328431680. Its totient is φ = 1188059040.

The previous prime is 1256948347. The next prime is 1256948353. The reversal of 1256948351 is 1538496521.

It is a happy number.

It is not a de Polignac number, because 1256948351 - 2² = 1256948347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256948353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46355 + ... + 68283.

It is an arithmetic number, because the mean of its divisors is an integer number (110702640).

Almost surely, 2^1256948351 is an apocalyptic number.

1256948351 is a deficient number, since it is larger than the sum of its proper divisors (71483329).

1256948351 is an equidigital number, since it uses as much as digits as its factorization.

1256948351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22046 (or 22003 counting only the distinct ones).

The product of its digits is 259200, while the sum is 44.

The square root of 1256948351 is about 35453.4674044726. The cubic root of 1256948351 is about 1079.2096272007.

The spelling of 1256948351 in words is "one billion, two hundred fifty-six million, nine hundred forty-eight thousand, three hundred fifty-one".