12251550 has 24 divisors (see below), whose sum is σ = 30384216. Its totient is φ = 3267040.

The previous prime is 12251549. The next prime is 12251567. The reversal of 12251550 is 5515221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40689 + ... + 40988.

It is an arithmetic number, because the mean of its divisors is an integer number (1266009).

Almost surely, 2^12251550 is an apocalyptic number.

12251550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12251550 is an abundant number, since it is smaller than the sum of its proper divisors (18132666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12251550 is a wasteful number, since it uses less digits than its factorization.

12251550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81692 (or 81687 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 12251550 is about 3500.2214215675. The cubic root of 12251550 is about 230.5315368817.

Adding to 12251550 its reverse (5515221), we get a palindrome (17766771).

It can be divided in two parts, 1225 and 1550, that added together give a triangular number (2775 = T₇₄).

The spelling of 12251550 in words is "twelve million, two hundred fifty-one thousand, five hundred fifty".