12139402 has 16 divisors (see below), whose sum is σ = 19922112. Its totient is φ = 5501920.

The previous prime is 12139381. The next prime is 12139409. The reversal of 12139402 is 20493121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (12139409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10518 + ... + 11614.

It is an arithmetic number, because the mean of its divisors is an integer number (1245132).

Almost surely, 2^12139402 is an apocalyptic number.

12139402 is a deficient number, since it is larger than the sum of its proper divisors (7782710).

12139402 is a wasteful number, since it uses less digits than its factorization.

12139402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 12139402 is about 3484.1644622492. The cubic root of 12139402 is about 229.8259679088.

The spelling of 12139402 in words is "twelve million, one hundred thirty-nine thousand, four hundred two".