123429972 has 24 divisors (see below), whose sum is σ = 297294592. Its totient is φ = 39816000.

The previous prime is 123429959. The next prime is 123430001. The reversal of 123429972 is 279924321.

It is a self number, because there is not a number n which added to its sum of digits gives 123429972.

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, 165529 + ... + 166272.

Almost surely, 2^123429972 is an apocalyptic number.

123429972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123429972 is an abundant number, since it is smaller than the sum of its proper divisors (173864620).

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

123429972 is a wasteful number, since it uses less digits than its factorization.

123429972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331839 (or 331837 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 123429972 is about 11109.9042300103. The cubic root of 123429972 is about 497.8978032578.

The spelling of 123429972 in words is "one hundred twenty-three million, four hundred twenty-nine thousand, nine hundred seventy-two".