12457790 has 8 divisors (see below), whose sum is σ = 22424040. Its totient is φ = 4983112.

The previous prime is 12457777. The next prime is 12457799. The reversal of 12457790 is 9775421.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12457790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12457799) 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, 622880 + ... + 622899.

It is an arithmetic number, because the mean of its divisors is an integer number (2803005).

Almost surely, 2^12457790 is an apocalyptic number.

12457790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12457790 is a deficient number, since it is larger than the sum of its proper divisors (9966250).

12457790 is a wasteful number, since it uses less digits than its factorization.

12457790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245786.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 12457790 is about 3529.5594625959. The cubic root of 12457790 is about 231.8179184693.

The spelling of 12457790 in words is "twelve million, four hundred fifty-seven thousand, seven hundred ninety".