129541397 has 4 divisors (see below), whose sum is σ = 130561536. Its totient is φ = 128521260.

The previous prime is 129541393. The next prime is 129541421. The reversal of 129541397 is 793145921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129541397 - 2² = 129541393 is a prime.

It is a super-3 number, since 3×129541397³ (a number of 25 digits) contains 333 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 (129541393) 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, 509879 + ... + 510132.

It is an arithmetic number, because the mean of its divisors is an integer number (32640384).

Almost surely, 2^129541397 is an apocalyptic number.

It is an amenable number.

129541397 is a deficient number, since it is larger than the sum of its proper divisors (1020139).

129541397 is a wasteful number, since it uses less digits than its factorization.

129541397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020138.

The product of its digits is 68040, while the sum is 41.

The square root of 129541397 is about 11381.6254111616. The cubic root of 129541397 is about 505.9833103902.

The spelling of 129541397 in words is "one hundred twenty-nine million, five hundred forty-one thousand, three hundred ninety-seven".