129377445 has 32 divisors (see below), whose sum is σ = 210729600. Its totient is φ = 67772160.

The previous prime is 129377377. The next prime is 129377453. The reversal of 129377445 is 544773921.

It is not a de Polignac number, because 129377445 - 2¹¹ = 129375397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129377397 and 129377406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 238875 + ... + 239415.

It is an arithmetic number, because the mean of its divisors is an integer number (6585300).

Almost surely, 2^129377445 is an apocalyptic number.

129377445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129377445 is a deficient number, since it is larger than the sum of its proper divisors (81352155).

129377445 is a wasteful number, since it uses less digits than its factorization.

129377445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805.

The product of its digits is 211680, while the sum is 42.

The square root of 129377445 is about 11374.4206445867. The cubic root of 129377445 is about 505.7697570397.

The spelling of 129377445 in words is "one hundred twenty-nine million, three hundred seventy-seven thousand, four hundred forty-five".