12139802 has 16 divisors (see below), whose sum is σ = 19365480. Its totient is φ = 5687808.

The previous prime is 12139789. The next prime is 12139807. The reversal of 12139802 is 20893121.

It can be written as a sum of positive squares in 4 ways, for example, as 11363641 + 776161 = 3371^2 + 881^2 .

It is not an unprimeable number, because it can be changed into a prime (12139807) 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, 8774 + ... + 10062.

Almost surely, 2^12139802 is an apocalyptic number.

12139802 is a deficient number, since it is larger than the sum of its proper divisors (7225678).

12139802 is a wasteful number, since it uses less digits than its factorization.

12139802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 12139802 is about 3484.2218643479. The cubic root of 12139802 is about 229.8284921786.

The spelling of 12139802 in words is "twelve million, one hundred thirty-nine thousand, eight hundred two".