129961445 has 8 divisors (see below), whose sum is σ = 156015744. Its totient is φ = 103927824.

The previous prime is 129961423. The next prime is 129961457. The reversal of 129961445 is 544169921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129961445 - 2⁸ = 129961189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18632 + ... + 24638.

It is an arithmetic number, because the mean of its divisors is an integer number (19501968).

Almost surely, 2^129961445 is an apocalyptic number.

It is an amenable number.

129961445 is a deficient number, since it is larger than the sum of its proper divisors (26054299).

129961445 is an equidigital number, since it uses as much as digits as its factorization.

129961445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10339.

The product of its digits is 77760, while the sum is 41.

The square root of 129961445 is about 11400.0633770168. The cubic root of 129961445 is about 506.5296170087.

It can be divided in two parts, 12996 and 1445, that added together give a palindrome (14441).

The spelling of 129961445 in words is "one hundred twenty-nine million, nine hundred sixty-one thousand, four hundred forty-five".