12457990 has 8 divisors (see below), whose sum is σ = 22424400. Its totient is φ = 4983192.

The previous prime is 12457981. The next prime is 12457993. The reversal of 12457990 is 9975421.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12457993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 622890 + ... + 622909.

It is an arithmetic number, because the mean of its divisors is an integer number (2803050).

Almost surely, 2^12457990 is an apocalyptic number.

12457990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12457990 is a deficient number, since it is larger than the sum of its proper divisors (9966410).

12457990 is a wasteful number, since it uses less digits than its factorization.

12457990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245806.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 12457990 is about 3529.5877946298. The cubic root of 12457990 is about 231.8191590140.

The spelling of 12457990 in words is "twelve million, four hundred fifty-seven thousand, nine hundred ninety".