402632171 has 2 divisors, whose sum is σ = 402632172. Its totient is φ = 402632170.

The previous prime is 402632141. The next prime is 402632183. The reversal of 402632171 is 171236204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402632171 is a prime.

It is a super-2 number, since 2×402632171² = 324225330248346482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 402632171.

It is not a weakly prime, because it can be changed into another prime (402632101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201316085 + 201316086.

It is an arithmetic number, because the mean of its divisors is an integer number (201316086).

Almost surely, 2^402632171 is an apocalyptic number.

402632171 is a deficient number, since it is larger than the sum of its proper divisors (1).

402632171 is an equidigital number, since it uses as much as digits as its factorization.

402632171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 402632171 is about 20065.6963746589. The cubic root of 402632171 is about 738.4189344208.

Adding to 402632171 its reverse (171236204), we get a palindrome (573868375).

The spelling of 402632171 in words is "four hundred two million, six hundred thirty-two thousand, one hundred seventy-one".