12139351 has 4 divisors (see below), whose sum is σ = 13873552. Its totient is φ = 10405152.

The previous prime is 12139349. The next prime is 12139381. The reversal of 12139351 is 15393121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12139351 - 2¹ = 12139349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12139381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 867090 + ... + 867103.

It is an arithmetic number, because the mean of its divisors is an integer number (3468388).

Almost surely, 2^12139351 is an apocalyptic number.

12139351 is a deficient number, since it is larger than the sum of its proper divisors (1734201).

12139351 is an equidigital number, since it uses as much as digits as its factorization.

12139351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734200.

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

The square root of 12139351 is about 3484.1571434136. The cubic root of 12139351 is about 229.8256460604.

The spelling of 12139351 in words is "twelve million, one hundred thirty-nine thousand, three hundred fifty-one".