129417131 has 4 divisors (see below), whose sum is σ = 130673712. Its totient is φ = 128160552.

The previous prime is 129417121. The next prime is 129417139. The reversal of 129417131 is 131714921.

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 129417131 - 2¹⁰ = 129416107 is a prime.

It is a super-2 number, since 2×129417131² = 33497587592542322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129417094 and 129417103.

It is not an unprimeable number, because it can be changed into a prime (129417139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 628136 + ... + 628341.

It is an arithmetic number, because the mean of its divisors is an integer number (32668428).

Almost surely, 2^129417131 is an apocalyptic number.

129417131 is a deficient number, since it is larger than the sum of its proper divisors (1256581).

129417131 is a wasteful number, since it uses less digits than its factorization.

129417131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256580.

The product of its digits is 1512, while the sum is 29.

The square root of 129417131 is about 11376.1650392388. The cubic root of 129417131 is about 505.8214660183.

The spelling of 129417131 in words is "one hundred twenty-nine million, four hundred seventeen thousand, one hundred thirty-one".