3945761 has 2 divisors, whose sum is σ = 3945762. Its totient is φ = 3945760.

The previous prime is 3945757. The next prime is 3945803. The reversal of 3945761 is 1675493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2307361 + 1638400 = 1519^2 + 1280^2 .

It is a cyclic number.

It is not a de Polignac number, because 3945761 - 2² = 3945757 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a plaindrome in base 11.

It is a zygodrome in base 11.

It is not a weakly prime, because it can be changed into another prime (3945701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1972880 + 1972881.

It is an arithmetic number, because the mean of its divisors is an integer number (1972881).

Almost surely, 2^3945761 is an apocalyptic number.

It is an amenable number.

3945761 is a deficient number, since it is larger than the sum of its proper divisors (1).

3945761 is an equidigital number, since it uses as much as digits as its factorization.

3945761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 35.

The square root of 3945761 is about 1986.3939689800. The cubic root of 3945761 is about 158.0193454922.

The spelling of 3945761 in words is "three million, nine hundred forty-five thousand, seven hundred sixty-one".