12509418 has 8 divisors (see below), whose sum is σ = 25018848. Its totient is φ = 4169804.

The previous prime is 12509389. The next prime is 12509423. The reversal of 12509418 is 81490521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

12509418 is an admirable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1042446 + ... + 1042457.

It is an arithmetic number, because the mean of its divisors is an integer number (3127356).

Almost surely, 2^12509418 is an apocalyptic number.

12509418 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12509418 is a wasteful number, since it uses less digits than its factorization.

12509418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084908.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 12509418 is about 3536.8655614824. The cubic root of 12509418 is about 232.1377130266.

Adding to 12509418 its reverse (81490521), we get a palindrome (93999939).

The spelling of 12509418 in words is "twelve million, five hundred nine thousand, four hundred eighteen".