256449001 has 8 divisors (see below), whose sum is σ = 268490880. Its totient is φ = 244620432.

The previous prime is 256448993. The next prime is 256449007. The reversal of 256449001 is 100944652.

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

It is a cyclic number.

It is not a de Polignac number, because 256449001 - 2³ = 256448993 is a prime.

It is a super-2 number, since 2×256449001² = 131532180227796002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256449007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50865 + ... + 55678.

It is an arithmetic number, because the mean of its divisors is an integer number (33561360).

Almost surely, 2^256449001 is an apocalyptic number.

It is an amenable number.

256449001 is a deficient number, since it is larger than the sum of its proper divisors (12041879).

256449001 is a wasteful number, since it uses less digits than its factorization.

256449001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106655.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 256449001 is about 16014.0251342378. The cubic root of 256449001 is about 635.3314251459.

The spelling of 256449001 in words is "two hundred fifty-six million, four hundred forty-nine thousand, one".