161902 has 12 divisors (see below), whose sum is σ = 263520. Its totient is φ = 74568.

The previous prime is 161881. The next prime is 161911. The reversal of 161902 is 209161.

It is a self number, because there is not a number n which added to its sum of digits gives 161902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 99 + ... + 577.

It is an arithmetic number, because the mean of its divisors is an integer number (21960).

2¹⁶¹⁹⁰² is an apocalyptic number.

161902 is a deficient number, since it is larger than the sum of its proper divisors (101618).

161902 is a wasteful number, since it uses less digits than its factorization.

161902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 161902 is about 402.3704760541. The cubic root of 161902 is about 54.5026231097.

The spelling of 161902 in words is "one hundred sixty-one thousand, nine hundred two".