42861761 has 2 divisors, whose sum is σ = 42861762. Its totient is φ = 42861760.

The previous prime is 42861757. The next prime is 42861779. The reversal of 42861761 is 16716824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24850225 + 18011536 = 4985^2 + 4244^2 .

It is a cyclic number.

It is not a de Polignac number, because 42861761 - 2² = 42861757 is a prime.

It is a super-2 number, since 2×42861761² = 3674261112042242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42861751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21430880 + 21430881.

It is an arithmetic number, because the mean of its divisors is an integer number (21430881).

Almost surely, 2^42861761 is an apocalyptic number.

It is an amenable number.

42861761 is a deficient number, since it is larger than the sum of its proper divisors (1).

42861761 is an equidigital number, since it uses as much as digits as its factorization.

42861761 is an odious number, because the sum of its binary digits is odd.

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

The square root of 42861761 is about 6546.8894140653. The cubic root of 42861761 is about 349.9639718017.

The spelling of 42861761 in words is "forty-two million, eight hundred sixty-one thousand, seven hundred sixty-one".