12146431 has 4 divisors (see below), whose sum is σ = 13250664. Its totient is φ = 11042200.

The previous prime is 12146417. The next prime is 12146441. The reversal of 12146431 is 13464121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12146431 - 2⁵ = 12146399 is a prime.

It is a super-2 number, since 2×12146431² = 295071572075522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12146401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552100 + ... + 552121.

It is an arithmetic number, because the mean of its divisors is an integer number (3312666).

Almost surely, 2^12146431 is an apocalyptic number.

12146431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12146431 is a deficient number, since it is larger than the sum of its proper divisors (1104233).

12146431 is a wasteful number, since it uses less digits than its factorization.

12146431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104232.

The product of its digits is 576, while the sum is 22.

The square root of 12146431 is about 3485.1730229646. The cubic root of 12146431 is about 229.8703175683.

The spelling of 12146431 in words is "twelve million, one hundred forty-six thousand, four hundred thirty-one".