139137015 has 8 divisors (see below), whose sum is σ = 222619248. Its totient is φ = 74206400.

The previous prime is 139136999. The next prime is 139137017. The reversal of 139137015 is 510731931.

It is a happy number.

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

It is not a de Polignac number, because 139137015 - 2⁴ = 139136999 is a prime.

It is a super-2 number, since 2×139137015² = 38718217886220450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139137017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4637886 + ... + 4637915.

It is an arithmetic number, because the mean of its divisors is an integer number (27827406).

Almost surely, 2^139137015 is an apocalyptic number.

139137015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

139137015 is a deficient number, since it is larger than the sum of its proper divisors (83482233).

139137015 is an equidigital number, since it uses as much as digits as its factorization.

139137015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9275809.

The product of its (nonzero) digits is 2835, while the sum is 30.

The square root of 139137015 is about 11795.6354216295. The cubic root of 139137015 is about 518.1802950653.

Adding to 139137015 its reverse (510731931), we get a palindrome (649868946).

The spelling of 139137015 in words is "one hundred thirty-nine million, one hundred thirty-seven thousand, fifteen".