129487001 has 16 divisors (see below), whose sum is σ = 153542400. Its totient is φ = 106843968.

The previous prime is 129486991. The next prime is 129487009. The reversal of 129487001 is 100784921.

It is not a de Polignac number, because 129487001 - 2¹⁸ = 129224857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129487009) 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, 88391 + ... + 89843.

It is an arithmetic number, because the mean of its divisors is an integer number (9596400).

Almost surely, 2^129487001 is an apocalyptic number.

It is an amenable number.

129487001 is a deficient number, since it is larger than the sum of its proper divisors (24055399).

129487001 is a wasteful number, since it uses less digits than its factorization.

129487001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 129487001 is about 11379.2355191375. The cubic root of 129487001 is about 505.9124776367.

The spelling of 129487001 in words is "one hundred twenty-nine million, four hundred eighty-seven thousand, one".