12157441 has 4 divisors (see below), whose sum is σ = 12170500. Its totient is φ = 12144384.

The previous prime is 12157429. The next prime is 12157459. The reversal of 12157441 is 14475121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14475121 = 2309 ⋅6269.

It can be written as a sum of positive squares in 2 ways, for example, as 6051600 + 6105841 = 2460^2 + 2471^2 .

It is a cyclic number.

It is not a de Polignac number, because 12157441 - 2²¹ = 10060289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12157141) 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, 5016 + ... + 7033.

It is an arithmetic number, because the mean of its divisors is an integer number (3042625).

Almost surely, 2^12157441 is an apocalyptic number.

It is an amenable number.

12157441 is a deficient number, since it is larger than the sum of its proper divisors (13059).

12157441 is a wasteful number, since it uses less digits than its factorization.

12157441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13058.

The product of its digits is 1120, while the sum is 25.

The square root of 12157441 is about 3486.7522137370. The cubic root of 12157441 is about 229.9397510748.

The spelling of 12157441 in words is "twelve million, one hundred fifty-seven thousand, four hundred forty-one".