2685731 has 2 divisors, whose sum is σ = 2685732. Its totient is φ = 2685730.

The previous prime is 2685703. The next prime is 2685757. The reversal of 2685731 is 1375862.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2685731 - 2⁶ = 2685667 is a prime.

It is a super-2 number, since 2×2685731² = 14426302008722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2682731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1342865 + 1342866.

It is an arithmetic number, because the mean of its divisors is an integer number (1342866).

2^2685731 is an apocalyptic number.

2685731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2685731 is an equidigital number, since it uses as much as digits as its factorization.

2685731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 2685731 is about 1638.8200023187. The cubic root of 2685731 is about 139.0019322403.

The spelling of 2685731 in words is "two million, six hundred eighty-five thousand, seven hundred thirty-one".