129250007 has 8 divisors (see below), whose sum is σ = 131120640. Its totient is φ = 127387000.

The previous prime is 129249979. The next prime is 129250021. The reversal of 129250007 is 700052921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129250007 - 2⁸ = 129249751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129250207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38132 + ... + 41382.

It is an arithmetic number, because the mean of its divisors is an integer number (16390080).

Almost surely, 2^129250007 is an apocalyptic number.

129250007 is a deficient number, since it is larger than the sum of its proper divisors (1870633).

129250007 is an equidigital number, since it uses as much as digits as its factorization.

129250007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3813.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 129250007 is about 11368.8173087617. The cubic root of 129250007 is about 505.6036398298.

The spelling of 129250007 in words is "one hundred twenty-nine million, two hundred fifty thousand, seven".