123379520 has 56 divisors (see below), whose sum is σ = 320515488. Its totient is φ = 44864000.

The previous prime is 123379517. The next prime is 123379541. The reversal of 123379520 is 25973321.

Added to its reverse (25973321) it gives a square (149352841 = 12221²).

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 14006 + ... + 21045.

Almost surely, 2^123379520 is an apocalyptic number.

123379520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123379520 is an abundant number, since it is smaller than the sum of its proper divisors (197135968).

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

123379520 is a wasteful number, since it uses less digits than its factorization.

123379520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35079 (or 35069 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 123379520 is about 11107.6334113077. The cubic root of 123379520 is about 497.8299554385.

Adding to 123379520 its reverse (25973321), we get a square (149352841 = 12221²).

The spelling of 123379520 in words is "one hundred twenty-three million, three hundred seventy-nine thousand, five hundred twenty".