1256426342 has 32 divisors (see below), whose sum is σ = 1976991744. Its totient is φ = 598168800.

The previous prime is 1256426329. The next prime is 1256426351. The reversal of 1256426342 is 2436246521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1155323 + ... + 1156409.

It is an arithmetic number, because the mean of its divisors is an integer number (61780992).

Almost surely, 2^1256426342 is an apocalyptic number.

1256426342 is a deficient number, since it is larger than the sum of its proper divisors (720565402).

1256426342 is a wasteful number, since it uses less digits than its factorization.

1256426342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404.

The product of its digits is 69120, while the sum is 35.

The square root of 1256426342 is about 35446.1047507339. The cubic root of 1256426342 is about 1079.0602084006.

The spelling of 1256426342 in words is "one billion, two hundred fifty-six million, four hundred twenty-six thousand, three hundred forty-two".