401685461 has 2 divisors, whose sum is σ = 401685462. Its totient is φ = 401685460.

The previous prime is 401685457. The next prime is 401685481. The reversal of 401685461 is 164586104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388326436 + 13359025 = 19706^2 + 3655^2 .

It is a cyclic number.

It is not a de Polignac number, because 401685461 - 2² = 401685457 is a prime.

It is a super-2 number, since 2×401685461² = 322702419157565042, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401685451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200842730 + 200842731.

It is an arithmetic number, because the mean of its divisors is an integer number (200842731).

Almost surely, 2^401685461 is an apocalyptic number.

It is an amenable number.

401685461 is a deficient number, since it is larger than the sum of its proper divisors (1).

401685461 is an equidigital number, since it uses as much as digits as its factorization.

401685461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 401685461 is about 20042.0922311020. The cubic root of 401685461 is about 737.8397314792.

The spelling of 401685461 in words is "four hundred one million, six hundred eighty-five thousand, four hundred sixty-one".