12685431 has 8 divisors (see below), whose sum is σ = 18451584. Its totient is φ = 7688120.

The previous prime is 12685427. The next prime is 12685433. The reversal of 12685431 is 13458621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12685431 - 2² = 12685427 is a prime.

It is a super-2 number, since 2×12685431² = 321840319311522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12685433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192171 + ... + 192236.

It is an arithmetic number, because the mean of its divisors is an integer number (2306448).

Almost surely, 2^12685431 is an apocalyptic number.

12685431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12685431 is a deficient number, since it is larger than the sum of its proper divisors (5766153).

12685431 is a wasteful number, since it uses less digits than its factorization.

12685431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384421.

The product of its digits is 5760, while the sum is 30.

The square root of 12685431 is about 3561.6612696886. The cubic root of 12685431 is about 233.2214059555.

The spelling of 12685431 in words is "twelve million, six hundred eighty-five thousand, four hundred thirty-one".