129025247 has 12 divisors (see below), whose sum is σ = 141694704. Its totient is φ = 117411840.

The previous prime is 129025207. The next prime is 129025279. The reversal of 129025247 is 742520921.

It is not a de Polignac number, because 129025247 - 2¹⁶ = 128959711 is a prime.

It is a super-2 number, since 2×129025247² = 33295028726822018, which contains 22 as substring.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129025207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6623 + ... + 17375.

It is an arithmetic number, because the mean of its divisors is an integer number (11807892).

Almost surely, 2^129025247 is an apocalyptic number.

129025247 is a deficient number, since it is larger than the sum of its proper divisors (12669457).

129025247 is a wasteful number, since it uses less digits than its factorization.

129025247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10850 (or 10837 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 129025247 is about 11358.9280744267. The cubic root of 129025247 is about 505.3103957215.

The spelling of 129025247 in words is "one hundred twenty-nine million, twenty-five thousand, two hundred forty-seven".