129001404 has 48 divisors (see below), whose sum is σ = 344736000. Its totient is φ = 36779136.

The previous prime is 129001399. The next prime is 129001409. The reversal of 129001404 is 404100921.

It is an interprime number because it is at equal distance from previous prime (129001399) and next prime (129001409).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129001409) 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, 46447 + ... + 49145.

It is an arithmetic number, because the mean of its divisors is an integer number (7182000).

Almost surely, 2^129001404 is an apocalyptic number.

129001404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

129001404 is an abundant number, since it is smaller than the sum of its proper divisors (215734596).

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

129001404 is a wasteful number, since it uses less digits than its factorization.

129001404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3282 (or 3280 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 129001404 is about 11357.8784990860. The cubic root of 129001404 is about 505.2792678137.

The spelling of 129001404 in words is "one hundred twenty-nine million, one thousand, four hundred four".