12509072 has 10 divisors (see below), whose sum is σ = 24236358. Its totient is φ = 6254528.

The previous prime is 12509009. The next prime is 12509083. The reversal of 12509072 is 27090521.

It can be written as a sum of positive squares in only one way, i.e., 12503296 + 5776 = 3536^2 + 76^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390893 + ... + 390924.

Almost surely, 2^12509072 is an apocalyptic number.

It is an amenable number.

12509072 is a deficient number, since it is larger than the sum of its proper divisors (11727286).

12509072 is an equidigital number, since it uses as much as digits as its factorization.

12509072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781825 (or 781819 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 12509072 is about 3536.8166477781. The cubic root of 12509072 is about 232.1355727621.

Adding to 12509072 its reverse (27090521), we get a palindrome (39599593).

The spelling of 12509072 in words is "twelve million, five hundred nine thousand, seventy-two".