204140 has 24 divisors (see below), whose sum is σ = 438480. Its totient is φ = 79808.

The previous prime is 204137. The next prime is 204143. The reversal of 204140 is 41402.

204140 = 51² + 52² + ... + 90².

It is an interprime number because it is at equal distance from previous prime (204137) and next prime (204143).

It is not an unprimeable number, because it can be changed into a prime (204143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1094 + ... + 1266.

It is an arithmetic number, because the mean of its divisors is an integer number (18270).

2²⁰⁴¹⁴⁰ is an apocalyptic number.

204140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204140 is an abundant number, since it is smaller than the sum of its proper divisors (234340).

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

204140 is a wasteful number, since it uses less digits than its factorization.

204140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 204140 is about 451.8185476494. The cubic root of 204140 is about 58.8811165461.

Adding to 204140 its reverse (41402), we get a palindrome (245542).

The spelling of 204140 in words is "two hundred four thousand, one hundred forty", and thus it is an iban number.