129542998 has 32 divisors (see below), whose sum is σ = 215115264. Its totient is φ = 58134432.

The previous prime is 129542989. The next prime is 129542999. The reversal of 129542998 is 899245921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129542999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277161 + ... + 277627.

It is an arithmetic number, because the mean of its divisors is an integer number (6722352).

Almost surely, 2^129542998 is an apocalyptic number.

129542998 is a deficient number, since it is larger than the sum of its proper divisors (85572266).

129542998 is a wasteful number, since it uses less digits than its factorization.

129542998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756.

The product of its digits is 466560, while the sum is 49.

The square root of 129542998 is about 11381.6957436052. The cubic root of 129542998 is about 505.9853948614.

The spelling of 129542998 in words is "one hundred twenty-nine million, five hundred forty-two thousand, nine hundred ninety-eight".