6402169 has 2 divisors, whose sum is σ = 6402170. Its totient is φ = 6402168.

The previous prime is 6402167. The next prime is 6402181. The reversal of 6402169 is 9612046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3374569 + 3027600 = 1837^2 + 1740^2 .

It is a cyclic number.

It is not a de Polignac number, because 6402169 - 2¹ = 6402167 is a prime.

It is a super-2 number, since 2×6402169² = 81975535809122, which contains 22 as substring.

Together with 6402167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6402161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3201084 + 3201085.

It is an arithmetic number, because the mean of its divisors is an integer number (3201085).

Almost surely, 2^6402169 is an apocalyptic number.

It is an amenable number.

6402169 is a deficient number, since it is larger than the sum of its proper divisors (1).

6402169 is an equidigital number, since it uses as much as digits as its factorization.

6402169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 6402169 is about 2530.2507780850. The cubic root of 6402169 is about 185.6845251551.

It can be divided in two parts, 640 and 2169, that added together give a square (2809 = 53²).

The spelling of 6402169 in words is "six million, four hundred two thousand, one hundred sixty-nine".