129892942 has 4 divisors (see below), whose sum is σ = 194839416. Its totient is φ = 64946470.

The previous prime is 129892927. The next prime is 129892951. The reversal of 129892942 is 249298921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 249298921 = 1301 ⋅191621.

It is a junction number, because it is equal to n+sod(n) for n = 129892892 and 129892901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32473234 + ... + 32473237.

It is an arithmetic number, because the mean of its divisors is an integer number (48709854).

Almost surely, 2^129892942 is an apocalyptic number.

129892942 is a deficient number, since it is larger than the sum of its proper divisors (64946474).

129892942 is an equidigital number, since it uses as much as digits as its factorization.

129892942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64946473.

The product of its digits is 186624, while the sum is 46.

The square root of 129892942 is about 11397.0584801518. The cubic root of 129892942 is about 506.4406036946.

It can be divided in two parts, 12989 and 2942, that added together give a triangular number (15931 = T₁₇₈).

The spelling of 129892942 in words is "one hundred twenty-nine million, eight hundred ninety-two thousand, nine hundred forty-two".