129406357 has 4 divisors (see below), whose sum is σ = 130551660. Its totient is φ = 128261056.

The previous prime is 129406331. The next prime is 129406391. The reversal of 129406357 is 753604921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71250481 + 58155876 = 8441^2 + 7626^2 .

It is a cyclic number.

It is not a de Polignac number, because 129406357 - 2⁷ = 129406229 is a prime.

It is a super-2 number, since 2×129406357² = 33492010464022898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129406327) 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, 572482 + ... + 572707.

It is an arithmetic number, because the mean of its divisors is an integer number (32637915).

Almost surely, 2^129406357 is an apocalyptic number.

It is an amenable number.

129406357 is a deficient number, since it is larger than the sum of its proper divisors (1145303).

129406357 is a wasteful number, since it uses less digits than its factorization.

129406357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145302.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 129406357 is about 11375.6914954652. The cubic root of 129406357 is about 505.8074290520.

The spelling of 129406357 in words is "one hundred twenty-nine million, four hundred six thousand, three hundred fifty-seven".