129816452 has 6 divisors (see below), whose sum is σ = 227178798. Its totient is φ = 64908224.

The previous prime is 129816413. The next prime is 129816457. The reversal of 129816452 is 254618921.

It can be written as a sum of positive squares in only one way, i.e., 127554436 + 2262016 = 11294^2 + 1504^2 .

It is a super-2 number, since 2×129816452² = 33704622419736608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129816457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16227053 + ... + 16227060.

It is an arithmetic number, because the mean of its divisors is an integer number (37863133).

Almost surely, 2^129816452 is an apocalyptic number.

It is an amenable number.

129816452 is a deficient number, since it is larger than the sum of its proper divisors (97362346).

129816452 is a wasteful number, since it uses less digits than its factorization.

129816452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32454117 (or 32454115 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 129816452 is about 11393.7022955666. The cubic root of 129816452 is about 506.3411750229.

The spelling of 129816452 in words is "one hundred twenty-nine million, eight hundred sixteen thousand, four hundred fifty-two".