129450503 has 24 divisors (see below), whose sum is σ = 163826208. Its totient is φ = 101376576.

The previous prime is 129450487. The next prime is 129450521. The reversal of 129450503 is 305054921.

It is not a de Polignac number, because 129450503 - 2⁴ = 129450487 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 (129450533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64625 + ... + 66597.

It is an arithmetic number, because the mean of its divisors is an integer number (6826092).

Almost surely, 2^129450503 is an apocalyptic number.

129450503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

129450503 is a deficient number, since it is larger than the sum of its proper divisors (34375705).

129450503 is a wasteful number, since it uses less digits than its factorization.

129450503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103 (or 2096 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 129450503 is about 11377.6316955683. The cubic root of 129450503 is about 505.8649399724.

The spelling of 129450503 in words is "one hundred twenty-nine million, four hundred fifty thousand, five hundred three".