139725515 has 8 divisors (see below), whose sum is σ = 170032608. Its totient is φ = 110205760.

The previous prime is 139725497. The next prime is 139725539. The reversal of 139725515 is 515527931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139725515 - 2¹⁴ = 139709131 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 196442 + ... + 197151.

It is an arithmetic number, because the mean of its divisors is an integer number (21254076).

Almost surely, 2^139725515 is an apocalyptic number.

139725515 is a deficient number, since it is larger than the sum of its proper divisors (30307093).

139725515 is an equidigital number, since it uses as much as digits as its factorization.

139725515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393669.

The product of its digits is 47250, while the sum is 38.

The square root of 139725515 is about 11820.5547670150. The cubic root of 139725515 is about 518.9098401330.

The spelling of 139725515 in words is "one hundred thirty-nine million, seven hundred twenty-five thousand, five hundred fifteen".