12251565 has 12 divisors (see below), whose sum is σ = 21236124. Its totient is φ = 6534144.

The previous prime is 12251549. The next prime is 12251567. The reversal of 12251565 is 56515221.

It can be written as a sum of positive squares in 2 ways, for example, as 2196324 + 10055241 = 1482^2 + 3171^2 .

It is not a de Polignac number, because 12251565 - 2⁴ = 12251549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12251567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136084 + ... + 136173.

It is an arithmetic number, because the mean of its divisors is an integer number (1769677).

Almost surely, 2^12251565 is an apocalyptic number.

12251565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12251565 is a deficient number, since it is larger than the sum of its proper divisors (8984559).

12251565 is a wasteful number, since it uses less digits than its factorization.

12251565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272268 (or 272265 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 12251565 is about 3500.2235642884. The cubic root of 12251565 is about 230.5316309642.

Adding to 12251565 its reverse (56515221), we get a palindrome (68766786).

The spelling of 12251565 in words is "twelve million, two hundred fifty-one thousand, five hundred sixty-five".