1256832051 has 8 divisors (see below), whose sum is σ = 1679874960. Its totient is φ = 835838592.

The previous prime is 1256832047. The next prime is 1256832091. The reversal of 1256832051 is 1502386521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1256832051 - 2² = 1256832047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1256832001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510930 + ... + 513383.

It is an arithmetic number, because the mean of its divisors is an integer number (209984370).

Almost surely, 2^1256832051 is an apocalyptic number.

1256832051 is a deficient number, since it is larger than the sum of its proper divisors (423042909).

1256832051 is a wasteful number, since it uses less digits than its factorization.

1256832051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024725.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 1256832051 is about 35451.8271884539. The cubic root of 1256832051 is about 1079.1763413062.

The spelling of 1256832051 in words is "one billion, two hundred fifty-six million, eight hundred thirty-two thousand, fifty-one".