123641456 has 20 divisors (see below), whose sum is σ = 240994992. Its totient is φ = 61449216.

The previous prime is 123641447. The next prime is 123641467. The reversal of 123641456 is 654146321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20465 + ... + 25808.

Almost surely, 2^123641456 is an apocalyptic number.

123641456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123641456 is a deficient number, since it is larger than the sum of its proper divisors (117353536).

123641456 is a wasteful number, since it uses less digits than its factorization.

123641456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46448 (or 46442 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 123641456 is about 11119.4179703796. The cubic root of 123641456 is about 498.1820058058.

Adding to 123641456 its reverse (654146321), we get a palindrome (777787777).

The spelling of 123641456 in words is "one hundred twenty-three million, six hundred forty-one thousand, four hundred fifty-six".