12500442 has 24 divisors (see below), whose sum is σ = 28510560. Its totient is φ = 3947400.

The previous prime is 12500441. The next prime is 12500443. The reversal of 12500442 is 24400521.

It is an interprime number because it is at equal distance from previous prime (12500441) and next prime (12500443).

It is a super-2 number, since 2×12500442² = 312522100390728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12500441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17934 + ... + 18617.

It is an arithmetic number, because the mean of its divisors is an integer number (1187940).

Almost surely, 2^12500442 is an apocalyptic number.

12500442 is an abundant number, since it is smaller than the sum of its proper divisors (16010118).

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

12500442 is a wasteful number, since it uses less digits than its factorization.

12500442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36578 (or 36575 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 12500442 is about 3535.5964136196. The cubic root of 12500442 is about 232.0821770914.

Adding to 12500442 its reverse (24400521), we get a palindrome (36900963).

The spelling of 12500442 in words is "twelve million, five hundred thousand, four hundred forty-two".