12142407 has 4 divisors (see below), whose sum is σ = 16189880. Its totient is φ = 8094936.

The previous prime is 12142399. The next prime is 12142411. The reversal of 12142407 is 70424121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12142407 - 2³ = 12142399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12142807) by changing a digit.

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, 2023732 + ... + 2023737.

It is an arithmetic number, because the mean of its divisors is an integer number (4047470).

Almost surely, 2^12142407 is an apocalyptic number.

12142407 is a deficient number, since it is larger than the sum of its proper divisors (4047473).

12142407 is an equidigital number, since it uses as much as digits as its factorization.

12142407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4047472.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 12142407 is about 3484.5956723844. The cubic root of 12142407 is about 229.8449301294.

Adding to 12142407 its reverse (70424121), we get a palindrome (82566528).

The spelling of 12142407 in words is "twelve million, one hundred forty-two thousand, four hundred seven".