402002641 has 2 divisors, whose sum is σ = 402002642. Its totient is φ = 402002640.

The previous prime is 402002593. The next prime is 402002651. The reversal of 402002641 is 146200204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386948241 + 15054400 = 19671^2 + 3880^2 .

It is a cyclic number.

It is not a de Polignac number, because 402002641 - 2¹⁹ = 401478353 is a prime.

It is a super-2 number, since 2×402002641² = 323212246741949762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (402002651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201001320 + 201001321.

It is an arithmetic number, because the mean of its divisors is an integer number (201001321).

Almost surely, 2^402002641 is an apocalyptic number.

It is an amenable number.

402002641 is a deficient number, since it is larger than the sum of its proper divisors (1).

402002641 is an equidigital number, since it uses as much as digits as its factorization.

402002641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 402002641 is about 20050.0035162092. The cubic root of 402002641 is about 738.0338854113.

Adding to 402002641 its reverse (146200204), we get a palindrome (548202845).

The spelling of 402002641 in words is "four hundred two million, two thousand, six hundred forty-one".