129401315 has 4 divisors (see below), whose sum is σ = 155281584. Its totient is φ = 103521048.

The previous prime is 129401309. The next prime is 129401323. The reversal of 129401315 is 513104921.

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 129401315 - 2²² = 125207011 is a prime.

It is a super-4 number, since 4×129401315⁴ (a number of 34 digits) contains 4444 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, 12940127 + ... + 12940136.

It is an arithmetic number, because the mean of its divisors is an integer number (38820396).

Almost surely, 2^129401315 is an apocalyptic number.

129401315 is a deficient number, since it is larger than the sum of its proper divisors (25880269).

129401315 is an equidigital number, since it uses as much as digits as its factorization.

129401315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25880268.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 129401315 is about 11375.4698804049. The cubic root of 129401315 is about 505.8008597864.

The spelling of 129401315 in words is "one hundred twenty-nine million, four hundred one thousand, three hundred fifteen".