240506291 has 2 divisors, whose sum is σ = 240506292. Its totient is φ = 240506290.

The previous prime is 240506269. The next prime is 240506303. The reversal of 240506291 is 192605042.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240506291 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (240506221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120253145 + 120253146.

It is an arithmetic number, because the mean of its divisors is an integer number (120253146).

Almost surely, 2^240506291 is an apocalyptic number.

240506291 is a deficient number, since it is larger than the sum of its proper divisors (1).

240506291 is an equidigital number, since it uses as much as digits as its factorization.

240506291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 240506291 is about 15508.2652479251. The cubic root of 240506291 is about 621.8831842260.

The spelling of 240506291 in words is "two hundred forty million, five hundred six thousand, two hundred ninety-one".