12146139 has 16 divisors (see below), whose sum is σ = 18777600. Its totient is φ = 7744968.

The previous prime is 12146117. The next prime is 12146191. The reversal of 12146139 is 93164121.

It is not a de Polignac number, because 12146139 - 2⁵ = 12146107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12146039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9159 + ... + 10400.

It is an arithmetic number, because the mean of its divisors is an integer number (1173600).

Almost surely, 2^12146139 is an apocalyptic number.

12146139 is a deficient number, since it is larger than the sum of its proper divisors (6631461).

12146139 is a wasteful number, since it uses less digits than its factorization.

12146139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19591 (or 19585 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 12146139 is about 3485.1311309619. The cubic root of 12146139 is about 229.8684755273.

The spelling of 12146139 in words is "twelve million, one hundred forty-six thousand, one hundred thirty-nine".