12509142 has 16 divisors (see below), whose sum is σ = 25185792. Its totient is φ = 4141800.

The previous prime is 12509131. The next prime is 12509143. The reversal of 12509142 is 24190521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12509143) 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, 5998 + ... + 7809.

It is an arithmetic number, because the mean of its divisors is an integer number (1574112).

Almost surely, 2^12509142 is an apocalyptic number.

12509142 is an abundant number, since it is smaller than the sum of its proper divisors (12676650).

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

12509142 is a wasteful number, since it uses less digits than its factorization.

12509142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13963.

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

The square root of 12509142 is about 3536.8265436688. The cubic root of 12509142 is about 232.1360057668.

Adding to 12509142 its reverse (24190521), we get a palindrome (36699663).

The spelling of 12509142 in words is "twelve million, five hundred nine thousand, one hundred forty-two".