12140691 has 4 divisors (see below), whose sum is σ = 16187592. Its totient is φ = 8093792.

The previous prime is 12140683. The next prime is 12140693. The reversal of 12140691 is 19604121.

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 12140691 - 2³ = 12140683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12140693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2023446 + ... + 2023451.

It is an arithmetic number, because the mean of its divisors is an integer number (4046898).

Almost surely, 2^12140691 is an apocalyptic number.

12140691 is a deficient number, since it is larger than the sum of its proper divisors (4046901).

12140691 is an equidigital number, since it uses as much as digits as its factorization.

12140691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4046900.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 12140691 is about 3484.3494371260. The cubic root of 12140691 is about 229.8341021697.

The spelling of 12140691 in words is "twelve million, one hundred forty thousand, six hundred ninety-one".