12142509 has 8 divisors (see below), whose sum is σ = 16214880. Its totient is φ = 8082576.

The previous prime is 12142499. The next prime is 12142511. The reversal of 12142509 is 90524121.

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

It is not a de Polignac number, because 12142509 - 2⁷ = 12142381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12142579) 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, 522 + ... + 4955.

It is an arithmetic number, because the mean of its divisors is an integer number (2026860).

Almost surely, 2^12142509 is an apocalyptic number.

It is an amenable number.

12142509 is a deficient number, since it is larger than the sum of its proper divisors (4072371).

12142509 is an equidigital number, since it uses as much as digits as its factorization.

12142509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6219.

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

The square root of 12142509 is about 3484.6103081980. The cubic root of 12142509 is about 229.8455737172.

The spelling of 12142509 in words is "twelve million, one hundred forty-two thousand, five hundred nine".