12509412 has 12 divisors (see below), whose sum is σ = 29188656. Its totient is φ = 4169800.

The previous prime is 12509389. The next prime is 12509423. The reversal of 12509412 is 21490521.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521214 + ... + 521237.

It is an arithmetic number, because the mean of its divisors is an integer number (2432388).

Almost surely, 2^12509412 is an apocalyptic number.

12509412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12509412 is an abundant number, since it is smaller than the sum of its proper divisors (16679244).

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

12509412 is a wasteful number, since it uses less digits than its factorization.

12509412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042458 (or 1042456 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 12509412 is about 3536.8647132736. The cubic root of 12509412 is about 232.1376759125.

Adding to 12509412 its reverse (21490521), we get a palindrome (33999933).

It can be divided in two parts, 12509 and 412, that added together give a palindrome (12921).

The spelling of 12509412 in words is "twelve million, five hundred nine thousand, four hundred twelve".