203401 has 9 divisors (see below), whose sum is σ = 229159. Its totient is φ = 180400.

The previous prime is 203393. The next prime is 203417. The reversal of 203401 is 104302.

203401 = T₄₅₀ + T₄₅₁.

The square root of 203401 is 451.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9801 + 193600 = 99^2 + 440^2 .

It is not a de Polignac number, because 203401 - 2³ = 203393 is a prime.

It is an Ulam number.

It is a Duffinian number.

203401 is a lucky number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (203431) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4941 + ... + 4981.

2²⁰³⁴⁰¹ is an apocalyptic number.

203401 is the 451-st square number.

203401 is the 226-th centered octagonal number.

It is an amenable number.

203401 is a deficient number, since it is larger than the sum of its proper divisors (25758).

203401 is an equidigital number, since it uses as much as digits as its factorization.

203401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The cubic root of 203401 is about 58.8099794869.

Adding to 203401 its reverse (104302), we get a palindrome (307703).

Subtracting from 203401 its reverse (104302), we obtain a palindrome (99099).

The spelling of 203401 in words is "two hundred three thousand, four hundred one", and thus it is an iban number.