12455531 has 4 divisors (see below), whose sum is σ = 13587864. Its totient is φ = 11323200.

The previous prime is 12455503. The next prime is 12455533. The reversal of 12455531 is 13555421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12455531 - 2⁶ = 12455467 is a prime.

It is a super-2 number, since 2×12455531² = 310280504983922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12455531.

It is not an unprimeable number, because it can be changed into a prime (12455533) 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, 566150 + ... + 566171.

It is an arithmetic number, because the mean of its divisors is an integer number (3396966).

Almost surely, 2^12455531 is an apocalyptic number.

12455531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12455531 is a deficient number, since it is larger than the sum of its proper divisors (1132333).

12455531 is a wasteful number, since it uses less digits than its factorization.

12455531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132332.

The product of its digits is 3000, while the sum is 26.

The square root of 12455531 is about 3529.2394364792. The cubic root of 12455531 is about 231.8039055950.

It can be divided in two parts, 1245 and 5531, that added together give a palindrome (6776).

The spelling of 12455531 in words is "twelve million, four hundred fifty-five thousand, five hundred thirty-one".