129242630 has 32 divisors (see below), whose sum is σ = 256320288. Its totient is φ = 46528000.

The previous prime is 129242629. The next prime is 129242639. The reversal of 129242630 is 36242921.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 129242593 and 129242602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129242639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5294 + ... + 16926.

It is an arithmetic number, because the mean of its divisors is an integer number (8010009).

Almost surely, 2^129242630 is an apocalyptic number.

129242630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129242630 is a deficient number, since it is larger than the sum of its proper divisors (127077658).

129242630 is a wasteful number, since it uses less digits than its factorization.

129242630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11752.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 129242630 is about 11368.4928640519. The cubic root of 129242630 is about 505.5940204647.

The spelling of 129242630 in words is "one hundred twenty-nine million, two hundred forty-two thousand, six hundred thirty".