129023422 has 16 divisors (see below), whose sum is σ = 220309632. Its totient is φ = 56096920.

The previous prime is 129023347. The next prime is 129023423. The reversal of 129023422 is 224320921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129023423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126988 + ... + 127999.

It is an arithmetic number, because the mean of its divisors is an integer number (13769352).

Almost surely, 2^129023422 is an apocalyptic number.

129023422 is a deficient number, since it is larger than the sum of its proper divisors (91286210).

129023422 is a wasteful number, since it uses less digits than its factorization.

129023422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255023.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 129023422 is about 11358.8477408582. The cubic root of 129023422 is about 505.3080132529.

The spelling of 129023422 in words is "one hundred twenty-nine million, twenty-three thousand, four hundred twenty-two".