129542080 has 28 divisors (see below), whose sum is σ = 308472840. Its totient is φ = 51816704.

The previous prime is 129542071. The next prime is 129542089. The reversal of 129542080 is 80245921.

It is an interprime number because it is at equal distance from previous prime (129542071) and next prime (129542089).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129542089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202090 + ... + 202729.

Almost surely, 2^129542080 is an apocalyptic number.

129542080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129542080 is an abundant number, since it is smaller than the sum of its proper divisors (178930760).

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

129542080 is an equidigital number, since it uses as much as digits as its factorization.

129542080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404836 (or 404826 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 129542080 is about 11381.6554156239. The cubic root of 129542080 is about 505.9841996451.

The spelling of 129542080 in words is "one hundred twenty-nine million, five hundred forty-two thousand, eighty".