13020139 has 16 divisors (see below), whose sum is σ = 15116544. Its totient is φ = 11096800.

The previous prime is 13020131. The next prime is 13020151. The reversal of 13020139 is 93102031.

It is not a de Polignac number, because 13020139 - 2³ = 13020131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13020131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12924 + ... + 13894.

It is an arithmetic number, because the mean of its divisors is an integer number (944784).

Almost surely, 2^13020139 is an apocalyptic number.

13020139 is a deficient number, since it is larger than the sum of its proper divisors (2096405).

13020139 is a wasteful number, since it uses less digits than its factorization.

13020139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 13020139 is about 3608.3429715037. The cubic root of 13020139 is about 235.2548254328.

The spelling of 13020139 in words is "thirteen million, twenty thousand, one hundred thirty-nine".