12139495 has 4 divisors (see below), whose sum is σ = 14567400. Its totient is φ = 9711592.

The previous prime is 12139483. The next prime is 12139531. The reversal of 12139495 is 59493121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59493121 = 359 ⋅165719.

It is a cyclic number.

It is not a de Polignac number, because 12139495 - 2⁹ = 12138983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12139495.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1213945 + ... + 1213954.

It is an arithmetic number, because the mean of its divisors is an integer number (3641850).

Almost surely, 2^12139495 is an apocalyptic number.

12139495 is a deficient number, since it is larger than the sum of its proper divisors (2427905).

12139495 is an equidigital number, since it uses as much as digits as its factorization.

12139495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427904.

The product of its digits is 9720, while the sum is 34.

The square root of 12139495 is about 3484.1778083215. The cubic root of 12139495 is about 229.8265548065.

The spelling of 12139495 in words is "twelve million, one hundred thirty-nine thousand, four hundred ninety-five".