256235146 has 4 divisors (see below), whose sum is σ = 384352722. Its totient is φ = 128117572.

The previous prime is 256235141. The next prime is 256235149. The reversal of 256235146 is 641532652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 131354521 + 124880625 = 11461^2 + 11175^2 .

It is not an unprimeable number, because it can be changed into a prime (256235141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64058785 + ... + 64058788.

Almost surely, 2^256235146 is an apocalyptic number.

256235146 is a deficient number, since it is larger than the sum of its proper divisors (128117576).

256235146 is a wasteful number, since it uses less digits than its factorization.

256235146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128117575.

The product of its digits is 43200, while the sum is 34.

The square root of 256235146 is about 16007.3466258465. The cubic root of 256235146 is about 635.1547732758.

Adding to 256235146 its reverse (641532652), we get a palindrome (897767798).

The spelling of 256235146 in words is "two hundred fifty-six million, two hundred thirty-five thousand, one hundred forty-six".