12451516 has 24 divisors (see below), whose sum is σ = 27167616. Its totient is φ = 4851120.

The previous prime is 12451493. The next prime is 12451529. The reversal of 12451516 is 61515421.

It is a happy number.

12451516 is nontrivially palindromic in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19906 + ... + 20521.

It is an arithmetic number, because the mean of its divisors is an integer number (1131984).

Almost surely, 2^12451516 is an apocalyptic number.

It is an amenable number.

12451516 is an abundant number, since it is smaller than the sum of its proper divisors (14716100).

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

12451516 is a wasteful number, since it uses less digits than its factorization.

12451516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40449 (or 40447 counting only the distinct ones).

The product of its digits is 1200, while the sum is 25.

The square root of 12451516 is about 3528.6705711925. The cubic root of 12451516 is about 231.7789958394.

Adding to 12451516 its reverse (61515421), we get a palindrome (73966937).

The spelling of 12451516 in words is "twelve million, four hundred fifty-one thousand, five hundred sixteen".