129490715 has 4 divisors (see below), whose sum is σ = 155388864. Its totient is φ = 103592568.

The previous prime is 129490679. The next prime is 129490721. The reversal of 129490715 is 517094921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129490715 - 2¹⁰ = 129489691 is a prime.

It is a super-2 number, since 2×129490715² = 33535690542422450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12949067 + ... + 12949076.

It is an arithmetic number, because the mean of its divisors is an integer number (38847216).

Almost surely, 2^129490715 is an apocalyptic number.

129490715 is a deficient number, since it is larger than the sum of its proper divisors (25898149).

129490715 is an equidigital number, since it uses as much as digits as its factorization.

129490715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25898148.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 129490715 is about 11379.3987099495. The cubic root of 129490715 is about 505.9173145211.

The spelling of 129490715 in words is "one hundred twenty-nine million, four hundred ninety thousand, seven hundred fifteen".