12502421 has 4 divisors (see below), whose sum is σ = 12517932. Its totient is φ = 12486912.

The previous prime is 12502403. The next prime is 12502439. The reversal of 12502421 is 12420521.

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

It is an interprime number because it is at equal distance from previous prime (12502403) and next prime (12502439).

It can be written as a sum of positive squares in 2 ways, for example, as 7349521 + 5152900 = 2711^2 + 2270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12502421 is a prime.

It is a super-2 number, since 2×12502421² = 312621061722482, 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 12502421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12502481) 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, 6476 + ... + 8181.

It is an arithmetic number, because the mean of its divisors is an integer number (3129483).

Almost surely, 2^12502421 is an apocalyptic number.

It is an amenable number.

12502421 is a deficient number, since it is larger than the sum of its proper divisors (15511).

12502421 is an equidigital number, since it uses as much as digits as its factorization.

12502421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15510.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12502421 is about 3535.8762704597. The cubic root of 12502421 is about 232.0944237622.

Adding to 12502421 its reverse (12420521), we get a palindrome (24922942).

The spelling of 12502421 in words is "twelve million, five hundred two thousand, four hundred twenty-one".