401287 has 2 divisors, whose sum is σ = 401288. Its totient is φ = 401286.

The previous prime is 401279. The next prime is 401309. The reversal of 401287 is 782104.

It is an a-pointer prime, because the next prime (401309) can be obtained adding 401287 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401287 - 2³ = 401279 is a prime.

It is a super-2 number, since 2×401287² = 322062512738, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 401287.

It is not a weakly prime, because it can be changed into another prime (401237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200643 + 200644.

It is an arithmetic number, because the mean of its divisors is an integer number (200644).

2⁴⁰¹²⁸⁷ is an apocalyptic number.

401287 is a deficient number, since it is larger than the sum of its proper divisors (1).

401287 is an equidigital number, since it uses as much as digits as its factorization.

401287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 401287 is about 633.4721777632. The cubic root of 401287 is about 73.7595678480.

The spelling of 401287 in words is "four hundred one thousand, two hundred eighty-seven".