402881 has 2 divisors, whose sum is σ = 402882. Its totient is φ = 402880.

The previous prime is 402869. The next prime is 402923. The reversal of 402881 is 188204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250000 + 152881 = 500^2 + 391^2 .

It is a cyclic number.

It is not a de Polignac number, because 402881 - 2⁶ = 402817 is a prime.

It is a super-2 number, since 2×402881² = 324626200322, which contains 22 as substring.

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402881.

It is not a weakly prime, because it can be changed into another prime (402851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201440 + 201441.

It is an arithmetic number, because the mean of its divisors is an integer number (201441).

2⁴⁰²⁸⁸¹ is an apocalyptic number.

It is an amenable number.

402881 is a deficient number, since it is larger than the sum of its proper divisors (1).

402881 is an equidigital number, since it uses as much as digits as its factorization.

402881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 402881 is about 634.7290760632. The cubic root of 402881 is about 73.8571018813.

The spelling of 402881 in words is "four hundred two thousand, eight hundred eighty-one".