12345456 has 40 divisors (see below), whose sum is σ = 32033664. Its totient is φ = 4096960.

The previous prime is 12345439. The next prime is 12345479. The reversal of 12345456 is 65454321.

12345456 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14515 + ... + 15341.

Almost surely, 2^12345456 is an apocalyptic number.

12345456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12345456 is an abundant number, since it is smaller than the sum of its proper divisors (19688208).

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

12345456 is a wasteful number, since it uses less digits than its factorization.

12345456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149 (or 1143 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 12345456 is about 3513.6101092751. The cubic root of 12345456 is about 231.1190331220.

Adding to 12345456 its reverse (65454321), we get a palindrome (77799777).

The spelling of 12345456 in words is "twelve million, three hundred forty-five thousand, four hundred fifty-six".