250129 has 4 divisors (see below), whose sum is σ = 272880. Its totient is φ = 227380.

The previous prime is 250123. The next prime is 250147. The reversal of 250129 is 921052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 250129 - 2¹⁵ = 217361 is a prime.

It is an Ulam number.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (250123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11359 + ... + 11380.

It is an arithmetic number, because the mean of its divisors is an integer number (68220).

2²⁵⁰¹²⁹ is an apocalyptic number.

It is an amenable number.

250129 is a deficient number, since it is larger than the sum of its proper divisors (22751).

250129 is a wasteful number, since it uses less digits than its factorization.

250129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22750.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 250129 is about 500.1289833633. The cubic root of 250129 is about 63.0068859526.

The spelling of 250129 in words is "two hundred fifty thousand, one hundred twenty-nine".