12457240 has 32 divisors (see below), whose sum is σ = 28998000. Its totient is φ = 4810624.

The previous prime is 12457219. The next prime is 12457301. The reversal of 12457240 is 4275421.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4210 + ... + 6529.

Almost surely, 2^12457240 is an apocalyptic number.

12457240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12457240 is an abundant number, since it is smaller than the sum of its proper divisors (16540760).

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

12457240 is a wasteful number, since it uses less digits than its factorization.

12457240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10779 (or 10775 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 12457240 is about 3529.4815483297. The cubic root of 12457240 is about 231.8145069029.

The spelling of 12457240 in words is "twelve million, four hundred fifty-seven thousand, two hundred forty".