129598061 has 4 divisors (see below), whose sum is σ = 129620832. Its totient is φ = 129575292.

The previous prime is 129598037. The next prime is 129598097. The reversal of 129598061 is 160895921.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 160895921 = 31 ⋅5190191.

It is a cyclic number.

It is not a de Polignac number, because 129598061 - 2⁶ = 129597997 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 (129598661) 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, 5480 + ... + 17006.

It is an arithmetic number, because the mean of its divisors is an integer number (32405208).

Almost surely, 2^129598061 is an apocalyptic number.

It is an amenable number.

129598061 is a deficient number, since it is larger than the sum of its proper divisors (22771).

129598061 is a wasteful number, since it uses less digits than its factorization.

129598061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22770.

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 129598061 is about 11384.1144143934. The cubic root of 129598061 is about 506.0570753784.

The spelling of 129598061 in words is "one hundred twenty-nine million, five hundred ninety-eight thousand, sixty-one".