12515450 has 24 divisors (see below), whose sum is σ = 24293088. Its totient is φ = 4788080.

The previous prime is 12515449. The next prime is 12515453. The reversal of 12515450 is 5451521.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4292 + ... + 6591.

It is an arithmetic number, because the mean of its divisors is an integer number (1012212).

Almost surely, 2^12515450 is an apocalyptic number.

12515450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12515450 is a deficient number, since it is larger than the sum of its proper divisors (11777638).

12515450 is a wasteful number, since it uses less digits than its factorization.

12515450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10918 (or 10913 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 12515450 is about 3537.7181911509. The cubic root of 12515450 is about 232.1750190435.

Adding to 12515450 its reverse (5451521), we get a palindrome (17966971).

The spelling of 12515450 in words is "twelve million, five hundred fifteen thousand, four hundred fifty".