256245465 has 32 divisors (see below), whose sum is σ = 469276416. Its totient is φ = 116962560.

The previous prime is 256245443. The next prime is 256245511. The reversal of 256245465 is 564542652.

It is not a de Polignac number, because 256245465 - 2⁵ = 256245433 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88135 + ... + 90995.

It is an arithmetic number, because the mean of its divisors is an integer number (14664888).

Almost surely, 2^256245465 is an apocalyptic number.

It is an amenable number.

256245465 is a deficient number, since it is larger than the sum of its proper divisors (213030951).

256245465 is a wasteful number, since it uses less digits than its factorization.

256245465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3729.

The product of its digits is 288000, while the sum is 39.

The square root of 256245465 is about 16007.6689433534. The cubic root of 256245465 is about 635.1632993950.

The spelling of 256245465 in words is "two hundred fifty-six million, two hundred forty-five thousand, four hundred sixty-five".