12523161 has 8 divisors (see below), whose sum is σ = 19082944. Its totient is φ = 7156080.

The previous prime is 12523153. The next prime is 12523177. The reversal of 12523161 is 16132521.

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

It is not a de Polignac number, because 12523161 - 2³ = 12523153 is a prime.

It is a super-2 number, since 2×12523161² = 313659122863842, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 596341 = 12523161 / (1 + 2 + 5 + 2 + 3 + 1 + 6 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12523111) 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, 298150 + ... + 298191.

It is an arithmetic number, because the mean of its divisors is an integer number (2385368).

Almost surely, 2^12523161 is an apocalyptic number.

It is an amenable number.

12523161 is a deficient number, since it is larger than the sum of its proper divisors (6559783).

12523161 is an equidigital number, since it uses as much as digits as its factorization.

12523161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596351.

The product of its digits is 360, while the sum is 21.

The square root of 12523161 is about 3538.8078501100. The cubic root of 12523161 is about 232.2226916940. Note that the first 3 decimals are identical.

Adding to 12523161 its reverse (16132521), we get a palindrome (28655682).

The spelling of 12523161 in words is "twelve million, five hundred twenty-three thousand, one hundred sixty-one".