129140457 has 8 divisors (see below), whose sum is σ = 172257120. Its totient is φ = 86058720.

The previous prime is 129140441. The next prime is 129140491. The reversal of 129140457 is 754041921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129140457 - 2⁴ = 129140441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129140497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1669 + ... + 16157.

It is an arithmetic number, because the mean of its divisors is an integer number (21532140).

Almost surely, 2^129140457 is an apocalyptic number.

It is an amenable number.

129140457 is a deficient number, since it is larger than the sum of its proper divisors (43116663).

129140457 is a wasteful number, since it uses less digits than its factorization.

129140457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17463.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 129140457 is about 11363.9982840548. The cubic root of 129140457 is about 505.4607525777.

The spelling of 129140457 in words is "one hundred twenty-nine million, one hundred forty thousand, four hundred fifty-seven".