402166 has 8 divisors (see below), whose sum is σ = 606744. Its totient is φ = 199920.

The previous prime is 402139. The next prime is 402197. The reversal of 402166 is 661204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55 + ... + 898.

It is an arithmetic number, because the mean of its divisors is an integer number (75843).

2⁴⁰²¹⁶⁶ is an apocalyptic number.

402166 is a deficient number, since it is larger than the sum of its proper divisors (204578).

402166 is a wasteful number, since it uses less digits than its factorization.

402166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 402166 is about 634.1655935164. The cubic root of 402166 is about 73.8133841761.

The spelling of 402166 in words is "four hundred two thousand, one hundred sixty-six".