12138354 has 24 divisors (see below), whose sum is σ = 26598780. Its totient is φ = 4000128.

The previous prime is 12138353. The next prime is 12138383. The reversal of 12138354 is 45383121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9162729 + 2975625 = 3027^2 + 1725^2 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12138353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2187 + ... + 5390.

Almost surely, 2^12138354 is an apocalyptic number.

12138354 is an abundant number, since it is smaller than the sum of its proper divisors (14460426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12138354 is a wasteful number, since it uses less digits than its factorization.

12138354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7674 (or 7671 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 12138354 is about 3484.0140642655. The cubic root of 12138354 is about 229.8193540589.

The spelling of 12138354 in words is "twelve million, one hundred thirty-eight thousand, three hundred fifty-four".