129769452 has 30 divisors (see below), whose sum is σ = 339243828. Its totient is φ = 43256376.

The previous prime is 129769439. The next prime is 129769463. The reversal of 129769452 is 254967921.

129769452 is a `hidden beast` number, since 129 + 76 + 9 + 452 = 666.

It is a super-2 number, since 2×129769452² = 33680221344760608, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129769398 and 129769407.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 199938 + ... + 200585.

Almost surely, 2^129769452 is an apocalyptic number.

129769452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129769452 is an abundant number, since it is smaller than the sum of its proper divisors (209474376).

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

129769452 is a wasteful number, since it uses less digits than its factorization.

129769452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400539 (or 400528 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 129769452 is about 11391.6395659273. The cubic root of 129769452 is about 506.2800607664.

The spelling of 129769452 in words is "one hundred twenty-nine million, seven hundred sixty-nine thousand, four hundred fifty-two".