256321034 has 16 divisors (see below), whose sum is σ = 387421056. Its totient is φ = 127184400.

The previous prime is 256321003. The next prime is 256321049. The reversal of 256321034 is 430123652.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 256320994 and 256321012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248099 + ... + 249129.

It is an arithmetic number, because the mean of its divisors is an integer number (24213816).

Almost surely, 2^256321034 is an apocalyptic number.

256321034 is a deficient number, since it is larger than the sum of its proper divisors (131100022).

256321034 is a wasteful number, since it uses less digits than its factorization.

256321034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 256321034 is about 16010.0291692426. The cubic root of 256321034 is about 635.2257316384.

Adding to 256321034 its reverse (430123652), we get a palindrome (686444686).

The spelling of 256321034 in words is "two hundred fifty-six million, three hundred twenty-one thousand, thirty-four".