401087 has 2 divisors, whose sum is σ = 401088. Its totient is φ = 401086.

The previous prime is 401077. The next prime is 401101. The reversal of 401087 is 780104.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401087 is a prime.

It is a Chen prime.

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 401087.

It is not a weakly prime, because it can be changed into another prime (401017) 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, 200543 + 200544.

It is an arithmetic number, because the mean of its divisors is an integer number (200544).

2⁴⁰¹⁰⁸⁷ is an apocalyptic number.

401087 is a deficient number, since it is larger than the sum of its proper divisors (1).

401087 is an equidigital number, since it uses as much as digits as its factorization.

401087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 401087 is about 633.3142979596. The cubic root of 401087 is about 73.7473119771.

The spelling of 401087 in words is "four hundred one thousand, eighty-seven".