250421 has 4 divisors (see below), whose sum is σ = 252000. Its totient is φ = 248844.

The previous prime is 250409. The next prime is 250423. The reversal of 250421 is 124052.

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 250421 - 2¹⁰ = 249397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 250396 and 250405.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 250421.

It is not an unprimeable number, because it can be changed into a prime (250423) 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, 521 + ... + 878.

It is an arithmetic number, because the mean of its divisors is an integer number (63000).

2²⁵⁰⁴²¹ is an apocalyptic number.

It is an amenable number.

250421 is a deficient number, since it is larger than the sum of its proper divisors (1579).

250421 is a wasteful number, since it uses less digits than its factorization.

250421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 250421 is about 500.4208229081. The cubic root of 250421 is about 63.0313944477.

Adding to 250421 its reverse (124052), we get a palindrome (374473).

The spelling of 250421 in words is "two hundred fifty thousand, four hundred twenty-one".