129013061 has 4 divisors (see below), whose sum is σ = 129052224. Its totient is φ = 128973900.

The previous prime is 129013039. The next prime is 129013067. The reversal of 129013061 is 160310921.

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.

It is a cyclic number.

It is not a de Polignac number, because 129013061 - 2¹⁴ = 128996677 is a prime.

It is a super-3 number, since 3×129013061³ (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 (129013067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14135 + ... + 21396.

It is an arithmetic number, because the mean of its divisors is an integer number (32263056).

Almost surely, 2^129013061 is an apocalyptic number.

It is an amenable number.

129013061 is a deficient number, since it is larger than the sum of its proper divisors (39163).

129013061 is an equidigital number, since it uses as much as digits as its factorization.

129013061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39162.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 129013061 is about 11358.3916555118. The cubic root of 129013061 is about 505.2944869324.

Adding to 129013061 its reverse (160310921), we get a palindrome (289323982).

The spelling of 129013061 in words is "one hundred twenty-nine million, thirteen thousand, sixty-one".