240490261 has 4 divisors (see below), whose sum is σ = 262353024. Its totient is φ = 218627500.

The previous prime is 240490253. The next prime is 240490319. The reversal of 240490261 is 162094042.

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 240490261 - 2³ = 240490253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240490661) 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, 10931365 + ... + 10931386.

It is an arithmetic number, because the mean of its divisors is an integer number (65588256).

Almost surely, 2^240490261 is an apocalyptic number.

It is an amenable number.

240490261 is a deficient number, since it is larger than the sum of its proper divisors (21862763).

240490261 is a wasteful number, since it uses less digits than its factorization.

240490261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21862762.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 240490261 is about 15507.7484181296. The cubic root of 240490261 is about 621.8693675272.

It can be divided in two parts, 2404 and 90261, that added together give a triangular number (92665 = T₄₃₀).

The spelling of 240490261 in words is "two hundred forty million, four hundred ninety thousand, two hundred sixty-one".