402165 has 24 divisors (see below), whose sum is σ = 725088. Its totient is φ = 213840.

The previous prime is 402139. The next prime is 402197. The reversal of 402165 is 561204.

It is a happy number.

It is not a de Polignac number, because 402165 - 2⁵ = 402133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1050 + ... + 1380.

It is an arithmetic number, because the mean of its divisors is an integer number (30212).

2⁴⁰²¹⁶⁵ is an apocalyptic number.

402165 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

402165 is a deficient number, since it is larger than the sum of its proper divisors (322923).

402165 is an equidigital number, since it uses as much as digits as its factorization.

402165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 402165 is about 634.1648050783. The cubic root of 402165 is about 73.8133229962.

Adding to 402165 its reverse (561204), we get a palindrome (963369).

The spelling of 402165 in words is "four hundred two thousand, one hundred sixty-five".