2685401 has 2 divisors, whose sum is σ = 2685402. Its totient is φ = 2685400.

The previous prime is 2685383. The next prime is 2685407. The reversal of 2685401 is 1045862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2544025 + 141376 = 1595^2 + 376^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2685401 is a prime.

It is a super-2 number, since 2×2685401² = 14422757061602, 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 (2685407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1342700 + 1342701.

It is an arithmetic number, because the mean of its divisors is an integer number (1342701).

2^2685401 is an apocalyptic number.

It is an amenable number.

2685401 is a deficient number, since it is larger than the sum of its proper divisors (1).

2685401 is an equidigital number, since it uses as much as digits as its factorization.

2685401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 2685401 is about 1638.7193170278. The cubic root of 2685401 is about 138.9962388783.

The spelling of 2685401 in words is "two million, six hundred eighty-five thousand, four hundred one".