12138735 has 32 divisors (see below), whose sum is σ = 22348800. Its totient is φ = 5511168.

The previous prime is 12138727. The next prime is 12138743. The reversal of 12138735 is 53783121.

It is an interprime number because it is at equal distance from previous prime (12138727) and next prime (12138743).

It is not a de Polignac number, because 12138735 - 2³ = 12138727 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19966 + ... + 20564.

It is an arithmetic number, because the mean of its divisors is an integer number (698400).

Almost surely, 2^12138735 is an apocalyptic number.

12138735 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12138735 is a deficient number, since it is larger than the sum of its proper divisors (10210065).

12138735 is a wasteful number, since it uses less digits than its factorization.

12138735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807.

The product of its digits is 5040, while the sum is 30.

The square root of 12138735 is about 3484.0687421462. The cubic root of 12138735 is about 229.8217585656.

The spelling of 12138735 in words is "twelve million, one hundred thirty-eight thousand, seven hundred thirty-five".