139056256 has 32 divisors (see below), whose sum is σ = 283793580. Its totient is φ = 67829760.

The previous prime is 139056251. The next prime is 139056263. The reversal of 139056256 is 652650931.

It can be written as a sum of positive squares in 2 ways, for example, as 138862656 + 193600 = 11784^2 + 440^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (139056251) 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, 8001 + ... + 18496.

Almost surely, 2^139056256 is an apocalyptic number.

139056256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

139056256 is an abundant number, since it is smaller than the sum of its proper divisors (144737324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139056256 is an equidigital number, since it uses as much as digits as its factorization.

139056256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26552 (or 26540 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 139056256 is about 11792.2116670284. The cubic root of 139056256 is about 518.0800202353.

The spelling of 139056256 in words is "one hundred thirty-nine million, fifty-six thousand, two hundred fifty-six".