129231424 has 105 divisors (see below), whose sum is σ = 309838217. Its totient is φ = 53475072.

The previous prime is 129231413. The next prime is 129231461. The reversal of 129231424 is 424132921.

The square root of 129231424 is 11368.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 67765824 + 61465600 = 8232^2 + 7840^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129231392 and 129231401.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 4456242 + ... + 4456270.

Almost surely, 2^129231424 is an apocalyptic number.

129231424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

129231424 is the 11368-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129231424

129231424 is an abundant number, since it is smaller than the sum of its proper divisors (180606793).

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

129231424 is an frugal number, since it uses more digits than its factorization.

129231424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 38 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The cubic root of 129231424 is about 505.5794075093.

The spelling of 129231424 in words is "one hundred twenty-nine million, two hundred thirty-one thousand, four hundred twenty-four".