139249456 has 10 divisors (see below), whose sum is σ = 269795852. Its totient is φ = 69624720.

The previous prime is 139249441. The next prime is 139249457. The reversal of 139249456 is 654942931.

It is not an unprimeable number, because it can be changed into a prime (139249457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4351530 + ... + 4351561.

Almost surely, 2^139249456 is an apocalyptic number.

139249456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

139249456 is a deficient number, since it is larger than the sum of its proper divisors (130546396).

139249456 is an equidigital number, since it uses as much as digits as its factorization.

139249456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8703099 (or 8703093 counting only the distinct ones).

The product of its digits is 233280, while the sum is 43.

The square root of 139249456 is about 11800.4006711637. The cubic root of 139249456 is about 518.3198434149.

The spelling of 139249456 in words is "one hundred thirty-nine million, two hundred forty-nine thousand, four hundred fifty-six".