256245746 has 8 divisors (see below), whose sum is σ = 385727664. Its totient is φ = 127669860.

The previous prime is 256245719. The next prime is 256245749. The reversal of 256245746 is 647542652.

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

It is not an unprimeable number, because it can be changed into a prime (256245749) 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, 225800 + ... + 226931.

It is an arithmetic number, because the mean of its divisors is an integer number (48215958).

Almost surely, 2^256245746 is an apocalyptic number.

256245746 is a deficient number, since it is larger than the sum of its proper divisors (129481918).

256245746 is a wasteful number, since it uses less digits than its factorization.

256245746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453016.

The product of its digits is 403200, while the sum is 41.

The square root of 256245746 is about 16007.6777203940. The cubic root of 256245746 is about 635.1635315692.

The spelling of 256245746 in words is "two hundred fifty-six million, two hundred forty-five thousand, seven hundred forty-six".