202491 has 12 divisors (see below), whose sum is σ = 296400. Its totient is φ = 133200.

The previous prime is 202481. The next prime is 202493. The reversal of 202491 is 194202.

It is not a de Polignac number, because 202491 - 2⁹ = 201979 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 202491.

It is not an unprimeable number, because it can be changed into a prime (202493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1266 + ... + 1416.

It is an arithmetic number, because the mean of its divisors is an integer number (24700).

2²⁰²⁴⁹¹ is an apocalyptic number.

202491 is a deficient number, since it is larger than the sum of its proper divisors (93909).

202491 is a wasteful number, since it uses less digits than its factorization.

202491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 202491 is about 449.9899998889. The cubic root of 202491 is about 58.7221446341.

Adding to 202491 its reverse (194202), we get a palindrome (396693).

The spelling of 202491 in words is "two hundred two thousand, four hundred ninety-one".