12013457 has 4 divisors (see below), whose sum is σ = 12240180. Its totient is φ = 11786736.

The previous prime is 12013447. The next prime is 12013459. The reversal of 12013457 is 75431021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9024016 + 2989441 = 3004^2 + 1729^2 .

It is a cyclic number.

It is not a de Polignac number, because 12013457 - 2⁸ = 12013201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12013459) 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, 113282 + ... + 113387.

It is an arithmetic number, because the mean of its divisors is an integer number (3060045).

Almost surely, 2^12013457 is an apocalyptic number.

It is an amenable number.

12013457 is a deficient number, since it is larger than the sum of its proper divisors (226723).

12013457 is an equidigital number, since it uses as much as digits as its factorization.

12013457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226722.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 12013457 is about 3466.0434215399. The cubic root of 12013457 is about 229.0283966489.

Adding to 12013457 its reverse (75431021), we get a palindrome (87444478).

The spelling of 12013457 in words is "twelve million, thirteen thousand, four hundred fifty-seven".