12538943 has 6 divisors (see below), whose sum is σ = 12689424. Its totient is φ = 12390224.

The previous prime is 12538931. The next prime is 12538949. The reversal of 12538943 is 34983521.

It is a de Polignac number, because none of the positive numbers 2^k-12538943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12538949) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7130 + ... + 8712.

It is an arithmetic number, because the mean of its divisors is an integer number (2114904).

Almost surely, 2^12538943 is an apocalyptic number.

12538943 is a deficient number, since it is larger than the sum of its proper divisors (150481).

12538943 is an frugal number, since it uses more digits than its factorization.

12538943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761 (or 1672 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 12538943 is about 3541.0369950058. The cubic root of 12538943 is about 232.3202016876.

The spelling of 12538943 in words is "twelve million, five hundred thirty-eight thousand, nine hundred forty-three".