129252903 has 32 divisors (see below), whose sum is σ = 189477120. Its totient is φ = 77898240.

The previous prime is 129252901. The next prime is 129252911. The reversal of 129252903 is 309252921.

It is not a de Polignac number, because 129252903 - 2¹ = 129252901 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129252901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 612468 + ... + 612678.

It is an arithmetic number, because the mean of its divisors is an integer number (5921160).

Almost surely, 2^129252903 is an apocalyptic number.

129252903 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

129252903 is a deficient number, since it is larger than the sum of its proper divisors (60224217).

129252903 is a wasteful number, since it uses less digits than its factorization.

129252903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 129252903 is about 11368.9446739792. The cubic root of 129252903 is about 505.6074160184.

The spelling of 129252903 in words is "one hundred twenty-nine million, two hundred fifty-two thousand, nine hundred three".