256302123 has 16 divisors (see below), whose sum is σ = 426061056. Its totient is φ = 133143840.

The previous prime is 256302121. The next prime is 256302127. The reversal of 256302123 is 321203652.

It is not a de Polignac number, because 256302123 - 2¹ = 256302121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256302093 and 256302102.

It is not an unprimeable number, because it can be changed into a prime (256302121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 554536 + ... + 554997.

It is an arithmetic number, because the mean of its divisors is an integer number (26628816).

Almost surely, 2^256302123 is an apocalyptic number.

256302123 is a deficient number, since it is larger than the sum of its proper divisors (169758933).

256302123 is a wasteful number, since it uses less digits than its factorization.

256302123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109554.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 256302123 is about 16009.4385597997. The cubic root of 256302123 is about 635.2101092383.

Adding to 256302123 its reverse (321203652), we get a palindrome (577505775).

The spelling of 256302123 in words is "two hundred fifty-six million, three hundred two thousand, one hundred twenty-three".