3985511 has 2 divisors, whose sum is σ = 3985512. Its totient is φ = 3985510.

The previous prime is 3985469. The next prime is 3985519. The reversal of 3985511 is 1155893.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3985511 is a prime.

It is a super-2 number, since 2×3985511² = 31768595862242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3985519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1992755 + 1992756.

It is an arithmetic number, because the mean of its divisors is an integer number (1992756).

Almost surely, 2^3985511 is an apocalyptic number.

3985511 is a deficient number, since it is larger than the sum of its proper divisors (1).

3985511 is an equidigital number, since it uses as much as digits as its factorization.

3985511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 32.

The square root of 3985511 is about 1996.3744638719. The cubic root of 3985511 is about 158.5482078613.

The spelling of 3985511 in words is "three million, nine hundred eighty-five thousand, five hundred eleven".