15139930 has 16 divisors (see below), whose sum is σ = 29348424. Its totient is φ = 5590080.

The previous prime is 15139921. The next prime is 15139937. The reversal of 15139930 is 3993151.

It can be written as a sum of positive squares in 4 ways, for example, as 5424241 + 9715689 = 2329^2 + 3117^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15139892 and 15139901.

It is not an unprimeable number, because it can be changed into a prime (15139937) 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 in 7 ways as a sum of consecutive naturals, for example, 58101 + ... + 58360.

Almost surely, 2^15139930 is an apocalyptic number.

15139930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15139930 is a deficient number, since it is larger than the sum of its proper divisors (14208494).

15139930 is a wasteful number, since it uses less digits than its factorization.

15139930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116481.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 15139930 is about 3891.0062965768. The cubic root of 15139930 is about 247.3857173979.

The spelling of 15139930 in words is "fifteen million, one hundred thirty-nine thousand, nine hundred thirty".