123561456 has 40 divisors (see below), whose sum is σ = 319611984. Its totient is φ = 41134080.

The previous prime is 123561439. The next prime is 123561461. The reversal of 123561456 is 654165321.

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, 58336 + ... + 60416.

Almost surely, 2^123561456 is an apocalyptic number.

123561456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123561456 is an abundant number, since it is smaller than the sum of its proper divisors (196050528).

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

123561456 is a wasteful number, since it uses less digits than its factorization.

123561456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3329 (or 3323 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 123561456 is about 11115.8200777091. The cubic root of 123561456 is about 498.0745360283.

The spelling of 123561456 in words is "one hundred twenty-three million, five hundred sixty-one thousand, four hundred fifty-six".