402511 has 2 divisors, whose sum is σ = 402512. Its totient is φ = 402510.

The previous prime is 402503. The next prime is 402517. The reversal of 402511 is 115204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402511 - 2³ = 402503 is a prime.

It is a Chen prime.

402511 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 402491 and 402500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201255 + 201256.

It is an arithmetic number, because the mean of its divisors is an integer number (201256).

2⁴⁰²⁵¹¹ is an apocalyptic number.

402511 is a deficient number, since it is larger than the sum of its proper divisors (1).

402511 is an equidigital number, since it uses as much as digits as its factorization.

402511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 402511 is about 634.4375461777. The cubic root of 402511 is about 73.8344851967.

Adding to 402511 its reverse (115204), we get a palindrome (517715).

The spelling of 402511 in words is "four hundred two thousand, five hundred eleven".