12139513 has 8 divisors (see below), whose sum is σ = 12889800. Its totient is φ = 11393280.

The previous prime is 12139483. The next prime is 12139531. The reversal of 12139513 is 31593121.

It can be written as a sum of positive squares in 4 ways, for example, as 1557504 + 10582009 = 1248^2 + 3253^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12139513 - 2¹³ = 12131321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12139573) 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, 7063 + ... + 8611.

It is an arithmetic number, because the mean of its divisors is an integer number (1611225).

Almost surely, 2^12139513 is an apocalyptic number.

It is an amenable number.

12139513 is a deficient number, since it is larger than the sum of its proper divisors (750287).

12139513 is a wasteful number, since it uses less digits than its factorization.

12139513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027.

The product of its digits is 810, while the sum is 25.

The square root of 12139513 is about 3484.1803914264. The cubic root of 12139513 is about 229.8266683992.

The spelling of 12139513 in words is "twelve million, one hundred thirty-nine thousand, five hundred thirteen".