12442551 has 24 divisors (see below), whose sum is σ = 18436992. Its totient is φ = 7458000.

The previous prime is 12442531. The next prime is 12442553. The reversal of 12442551 is 15524421.

It is a de Polignac number, because none of the positive numbers 2^k-12442551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12442553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54700 + ... + 54926.

It is an arithmetic number, because the mean of its divisors is an integer number (768208).

Almost surely, 2^12442551 is an apocalyptic number.

12442551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12442551 is a deficient number, since it is larger than the sum of its proper divisors (5994441).

12442551 is a wasteful number, since it uses less digits than its factorization.

12442551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 392 counting only the distinct ones).

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

The square root of 12442551 is about 3527.4000340194. The cubic root of 12442551 is about 231.7233560927.

Adding to 12442551 its reverse (15524421), we get a palindrome (27966972).

The spelling of 12442551 in words is "twelve million, four hundred forty-two thousand, five hundred fifty-one".