202490261 has 4 divisors (see below), whose sum is σ = 203508000. Its totient is φ = 201472524.

The previous prime is 202490257. The next prime is 202490287. The reversal of 202490261 is 162094202.

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 202490261 - 2² = 202490257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 202490261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202490231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508571 + ... + 508968.

It is an arithmetic number, because the mean of its divisors is an integer number (50877000).

Almost surely, 2^202490261 is an apocalyptic number.

It is an amenable number.

202490261 is a deficient number, since it is larger than the sum of its proper divisors (1017739).

202490261 is a wasteful number, since it uses less digits than its factorization.

202490261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017738.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 202490261 is about 14229.9072730640. The cubic root of 202490261 is about 587.2207319760.

The spelling of 202490261 in words is "two hundred two million, four hundred ninety thousand, two hundred sixty-one".