12145657 has 8 divisors (see below), whose sum is σ = 12598976. Its totient is φ = 11698992.

The previous prime is 12145607. The next prime is 12145669. The reversal of 12145657 is 75654121.

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

It is a cyclic number.

It is not a de Polignac number, because 12145657 - 2¹⁵ = 12112889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12145607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2218 + ... + 5404.

It is an arithmetic number, because the mean of its divisors is an integer number (1574872).

Almost surely, 2^12145657 is an apocalyptic number.

It is an amenable number.

12145657 is a deficient number, since it is larger than the sum of its proper divisors (453319).

12145657 is a wasteful number, since it uses less digits than its factorization.

12145657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3327.

The product of its digits is 8400, while the sum is 31.

The square root of 12145657 is about 3485.0619793628. The cubic root of 12145657 is about 229.8654348334.

Adding to 12145657 its reverse (75654121), we get a palindrome (87799778).

The spelling of 12145657 in words is "twelve million, one hundred forty-five thousand, six hundred fifty-seven".