129530136 has 16 divisors (see below), whose sum is σ = 323825400. Its totient is φ = 43176704.

The previous prime is 129530129. The next prime is 129530143. The reversal of 129530136 is 631035921.

It is an interprime number because it is at equal distance from previous prime (129530129) and next prime (129530143).

It is a super-2 number, since 2×129530136² = 33556112264356992, 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 3 ways as a sum of consecutive naturals, for example, 2698521 + ... + 2698568.

Almost surely, 2^129530136 is an apocalyptic number.

It is an amenable number.

129530136 is an abundant number, since it is smaller than the sum of its proper divisors (194295264).

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

129530136 is a wasteful number, since it uses less digits than its factorization.

129530136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5397098 (or 5397094 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 129530136 is about 11381.1306995395. The cubic root of 129530136 is about 505.9686482994.

The spelling of 129530136 in words is "one hundred twenty-nine million, five hundred thirty thousand, one hundred thirty-six".