129256453 has 16 divisors (see below), whose sum is σ = 137106432. Its totient is φ = 121680000.

The previous prime is 129256427. The next prime is 129256483. The reversal of 129256453 is 354652921.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129256453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129256483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247833 + ... + 248353.

It is an arithmetic number, because the mean of its divisors is an integer number (8569152).

Almost surely, 2^129256453 is an apocalyptic number.

It is an amenable number.

129256453 is a deficient number, since it is larger than the sum of its proper divisors (7849979).

129256453 is a wasteful number, since it uses less digits than its factorization.

129256453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756.

The product of its digits is 64800, while the sum is 37.

The square root of 129256453 is about 11369.1007999753. The cubic root of 129256453 is about 505.6120449019.

The spelling of 129256453 in words is "one hundred twenty-nine million, two hundred fifty-six thousand, four hundred fifty-three".