12250817 has 4 divisors (see below), whose sum is σ = 12260820. Its totient is φ = 12240816.

The previous prime is 12250769. The next prime is 12250831. The reversal of 12250817 is 71805221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2163841 + 10086976 = 1471^2 + 3176^2 .

It is a cyclic number.

It is not a de Polignac number, because 12250817 - 2⁸ = 12250561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12253817) 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, 2858 + ... + 5715.

It is an arithmetic number, because the mean of its divisors is an integer number (3065205).

Almost surely, 2^12250817 is an apocalyptic number.

12250817 is the 2858-th pentagonal number.

It is an amenable number.

12250817 is a deficient number, since it is larger than the sum of its proper divisors (10003).

12250817 is an equidigital number, since it uses as much as digits as its factorization.

12250817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10002.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 12250817 is about 3500.1167123397. The cubic root of 12250817 is about 230.5269392869.

The spelling of 12250817 in words is "twelve million, two hundred fifty thousand, eight hundred seventeen".