139504 has 10 divisors (see below), whose sum is σ = 270320. Its totient is φ = 69744.

The previous prime is 139501. The next prime is 139511. The reversal of 139504 is 405931.

It is a super-2 number, since 2×139504² = 38922732032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4344 + ... + 4375.

It is an arithmetic number, because the mean of its divisors is an integer number (27032).

2¹³⁹⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

139504 is a deficient number, since it is larger than the sum of its proper divisors (130816).

139504 is an equidigital number, since it uses as much as digits as its factorization.

139504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8727 (or 8721 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 139504 is about 373.5023426968. The cubic root of 139504 is about 51.8635475759.

The spelling of 139504 in words is "one hundred thirty-nine thousand, five hundred four".