129386452 has 24 divisors (see below), whose sum is σ = 244213256. Its totient is φ = 59626368.

The previous prime is 129386449. The next prime is 129386461. The reversal of 129386452 is 254683921.

It can be written as a sum of positive squares in 4 ways, for example, as 11316496 + 118069956 = 3364^2 + 10866^2 .

It is a super-2 number, since 2×129386452² = 33481707922296608, which contains 22 as substring.

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, 42898 + ... + 45814.

Almost surely, 2^129386452 is an apocalyptic number.

It is an amenable number.

129386452 is a deficient number, since it is larger than the sum of its proper divisors (114826804).

129386452 is a wasteful number, since it uses less digits than its factorization.

129386452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3787 (or 3785 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 129386452 is about 11374.8165699496. The cubic root of 129386452 is about 505.7814936617.

The spelling of 129386452 in words is "one hundred twenty-nine million, three hundred eighty-six thousand, four hundred fifty-two".