129245938 has 4 divisors (see below), whose sum is σ = 193868910. Its totient is φ = 64622968.

The previous prime is 129245933. The next prime is 129245939. The reversal of 129245938 is 839542921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 129208689 + 37249 = 11367^2 + 193^2 .

It is a junction number, because it is equal to n+sod(n) for n = 129245894 and 129245903.

It is not an unprimeable number, because it can be changed into a prime (129245933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32311483 + ... + 32311486.

Almost surely, 2^129245938 is an apocalyptic number.

129245938 is a deficient number, since it is larger than the sum of its proper divisors (64622972).

129245938 is an equidigital number, since it uses as much as digits as its factorization.

129245938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64622971.

The product of its digits is 155520, while the sum is 43.

The square root of 129245938 is about 11368.6383529427. The cubic root of 129245938 is about 505.5983340330.

The spelling of 129245938 in words is "one hundred twenty-nine million, two hundred forty-five thousand, nine hundred thirty-eight".