240251761 has 2 divisors, whose sum is σ = 240251762. Its totient is φ = 240251760.

The previous prime is 240251743. The next prime is 240251777. The reversal of 240251761 is 167152042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235162225 + 5089536 = 15335^2 + 2256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240251761 is a prime.

It is a super-2 number, since 2×240251761² = 115441817327202242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (240251461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120125880 + 120125881.

It is an arithmetic number, because the mean of its divisors is an integer number (120125881).

Almost surely, 2^240251761 is an apocalyptic number.

It is an amenable number.

240251761 is a deficient number, since it is larger than the sum of its proper divisors (1).

240251761 is an equidigital number, since it uses as much as digits as its factorization.

240251761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 240251761 is about 15500.0568063475. The cubic root of 240251761 is about 621.6637252419.

The spelling of 240251761 in words is "two hundred forty million, two hundred fifty-one thousand, seven hundred sixty-one".