256425097 has 4 divisors (see below), whose sum is σ = 259514640. Its totient is φ = 253335556.

The previous prime is 256425089. The next prime is 256425107. The reversal of 256425097 is 790524652.

256425097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 256425097 - 2³ = 256425089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256425017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1544647 + ... + 1544812.

It is an arithmetic number, because the mean of its divisors is an integer number (64878660).

Almost surely, 2^256425097 is an apocalyptic number.

It is an amenable number.

256425097 is a deficient number, since it is larger than the sum of its proper divisors (3089543).

256425097 is an equidigital number, since it uses as much as digits as its factorization.

256425097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3089542.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 256425097 is about 16013.2787710700. The cubic root of 256425097 is about 635.3116844643.

The spelling of 256425097 in words is "two hundred fifty-six million, four hundred twenty-five thousand, ninety-seven".