12215454 has 16 divisors (see below), whose sum is σ = 24741120. Its totient is φ = 4020120.

The previous prime is 12215449. The next prime is 12215473. The reversal of 12215454 is 45451221.

It is a super-2 number, since 2×12215454² = 298434632852232, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12412 + ... + 13359.

It is an arithmetic number, because the mean of its divisors is an integer number (1546320).

Almost surely, 2^12215454 is an apocalyptic number.

12215454 is an abundant number, since it is smaller than the sum of its proper divisors (12525666).

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

12215454 is a wasteful number, since it uses less digits than its factorization.

12215454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25855.

The product of its digits is 1600, while the sum is 24.

The square root of 12215454 is about 3495.0613728517. The cubic root of 12215454 is about 230.3049138039.

Adding to 12215454 its reverse (45451221), we get a palindrome (57666675).

It can be divided in two parts, 122 and 15454, that added together give a triangular number (15576 = T₁₇₆).

The spelling of 12215454 in words is "twelve million, two hundred fifteen thousand, four hundred fifty-four".