401281217 has 2 divisors, whose sum is σ = 401281218. Its totient is φ = 401281216.

The previous prime is 401281201. The next prime is 401281229. The reversal of 401281217 is 712182104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376321201 + 24960016 = 19399^2 + 4996^2 .

It is a cyclic number.

It is not a de Polignac number, because 401281217 - 2⁴ = 401281201 is a prime.

It is a super-2 number, since 2×401281217² = 322053230234002178, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (401283217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200640608 + 200640609.

It is an arithmetic number, because the mean of its divisors is an integer number (200640609).

Almost surely, 2^401281217 is an apocalyptic number.

It is an amenable number.

401281217 is a deficient number, since it is larger than the sum of its proper divisors (1).

401281217 is an equidigital number, since it uses as much as digits as its factorization.

401281217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 401281217 is about 20032.0048172918. The cubic root of 401281217 is about 737.5921352669.

The spelling of 401281217 in words is "four hundred one million, two hundred eighty-one thousand, two hundred seventeen".