12138495 has 16 divisors (see below), whose sum is σ = 19465440. Its totient is φ = 6459264.

The previous prime is 12138487. The next prime is 12138499. The reversal of 12138495 is 59483121.

It is not a de Polignac number, because 12138495 - 2³ = 12138487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12138499) 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, 10821 + ... + 11889.

It is an arithmetic number, because the mean of its divisors is an integer number (1216590).

Almost surely, 2^12138495 is an apocalyptic number.

12138495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12138495 is a deficient number, since it is larger than the sum of its proper divisors (7326945).

12138495 is a wasteful number, since it uses less digits than its factorization.

12138495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834.

The product of its digits is 8640, while the sum is 33.

The square root of 12138495 is about 3484.0342994867. The cubic root of 12138495 is about 229.8202439216.

The spelling of 12138495 in words is "twelve million, one hundred thirty-eight thousand, four hundred ninety-five".