256641034 has 12 divisors (see below), whose sum is σ = 416852406. Its totient is φ = 118449552.

The previous prime is 256641031. The next prime is 256641041. The reversal of 256641034 is 430146652.

It can be written as a sum of positive squares in 3 ways, for example, as 175695025 + 80946009 = 13255^2 + 8997^2 .

It is a junction number, because it is equal to n+sod(n) for n = 256640987 and 256641005.

It is not an unprimeable number, because it can be changed into a prime (256641031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 379309 + ... + 379984.

Almost surely, 2^256641034 is an apocalyptic number.

256641034 is a deficient number, since it is larger than the sum of its proper divisors (160211372).

256641034 is a wasteful number, since it uses less digits than its factorization.

256641034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759321 (or 759308 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 256641034 is about 16020.0197877531. The cubic root of 256641034 is about 635.4899675966.

Adding to 256641034 its reverse (430146652), we get a palindrome (686787686).

The spelling of 256641034 in words is "two hundred fifty-six million, six hundred forty-one thousand, thirty-four".