240671861 has 2 divisors, whose sum is σ = 240671862. Its totient is φ = 240671860.

The previous prime is 240671857. The next prime is 240671867. The reversal of 240671861 is 168176042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172922500 + 67749361 = 13150^2 + 8231^2 .

It is a cyclic number.

It is not a de Polignac number, because 240671861 - 2² = 240671857 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240671867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120335930 + 120335931.

It is an arithmetic number, because the mean of its divisors is an integer number (120335931).

Almost surely, 2^240671861 is an apocalyptic number.

It is an amenable number.

240671861 is a deficient number, since it is larger than the sum of its proper divisors (1).

240671861 is an equidigital number, since it uses as much as digits as its factorization.

240671861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 240671861 is about 15513.6024507527. The cubic root of 240671861 is about 622.0258576665.

The spelling of 240671861 in words is "two hundred forty million, six hundred seventy-one thousand, eight hundred sixty-one".