129231425 has 12 divisors (see below), whose sum is σ = 161327100. Its totient is φ = 102688320.

The previous prime is 129231413. The next prime is 129231461. The reversal of 129231425 is 524132921.

It is a Cunningham number, because it is equal to 11368²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 10137856 + 119093569 = 3184^2 + 10913^2 .

It is not a de Polignac number, because 129231425 - 2⁸ = 129231169 is a prime.

It is a super-2 number, since 2×129231425² = 33401522415061250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13622 + ... + 21071.

It is an arithmetic number, because the mean of its divisors is an integer number (13443925).

Almost surely, 2^129231425 is an apocalyptic number.

It is an amenable number.

129231425 is a deficient number, since it is larger than the sum of its proper divisors (32095675).

129231425 is a wasteful number, since it uses less digits than its factorization.

129231425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34852 (or 34847 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 129231425 is about 11368.0000439831. Note that the first 4 decimals coincide. The cubic root of 129231425 is about 505.5794088134.

The spelling of 129231425 in words is "one hundred twenty-nine million, two hundred thirty-one thousand, four hundred twenty-five".