139539456 has 264 divisors, whose sum is σ = 485384640. Its totient is φ = 39481344.

The previous prime is 139539437. The next prime is 139539467. The reversal of 139539456 is 654935931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1354701 + ... + 1354803.

Almost surely, 2^139539456 is an apocalyptic number.

139539456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139539456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242692320).

139539456 is an abundant number, since it is smaller than the sum of its proper divisors (345845184).

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

139539456 is a wasteful number, since it uses less digits than its factorization.

139539456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 115 counting only the distinct ones).

The product of its digits is 437400, while the sum is 45.

The square root of 139539456 is about 11812.6819985979. The cubic root of 139539456 is about 518.6794104171.

It can be divided in two parts, 13953 and 9456, that added together give a square (23409 = 153²).

The spelling of 139539456 in words is "one hundred thirty-nine million, five hundred thirty-nine thousand, four hundred fifty-six".