12390402 has 16 divisors (see below), whose sum is σ = 25060320. Its totient is φ = 4083552.

The previous prime is 12390401. The next prime is 12390403. The reversal of 12390402 is 20409321.

It is an interprime number because it is at equal distance from previous prime (12390401) and next prime (12390403).

It is not an unprimeable number, because it can be changed into a prime (12390401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11068 + ... + 12135.

It is an arithmetic number, because the mean of its divisors is an integer number (1566270).

Almost surely, 2^12390402 is an apocalyptic number.

12390402 is an abundant number, since it is smaller than the sum of its proper divisors (12669918).

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

12390402 is a wasteful number, since it uses less digits than its factorization.

12390402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23297.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 12390402 is about 3520.0002840909. Note that the first 3 decimals coincide. The cubic root of 12390402 is about 231.3991711514.

Adding to 12390402 its reverse (20409321), we get a palindrome (32799723).

It can be divided in two parts, 123 and 90402, that added together give a triangular number (90525 = T₄₂₅).

The spelling of 12390402 in words is "twelve million, three hundred ninety thousand, four hundred two".