129014550 has 108 divisors (see below), whose sum is σ = 403278876. Its totient is φ = 29484000.

The previous prime is 129014549. The next prime is 129014563. The reversal of 129014550 is 55410921.

129014550 is a `hidden beast` number, since 12 + 90 + 14 + 550 = 666.

It is a super-2 number, since 2×129014550² = 33289508223405000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 19125 + ... + 24975.

Almost surely, 2^129014550 is an apocalyptic number.

129014550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129014550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201639438).

129014550 is an abundant number, since it is smaller than the sum of its proper divisors (274264326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129014550 is a wasteful number, since it uses less digits than its factorization.

129014550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5883 (or 5868 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 129014550 is about 11358.4572015745. The cubic root of 129014550 is about 505.2964308715.

The spelling of 129014550 in words is "one hundred twenty-nine million, fourteen thousand, five hundred fifty".