161926 has 4 divisors (see below), whose sum is σ = 242892. Its totient is φ = 80962.

The previous prime is 161923. The next prime is 161947. The reversal of 161926 is 629161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 629161 = 13 ⋅48397.

It is a self number, because there is not a number n which added to its sum of digits gives 161926.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40480 + ... + 40483.

It is an arithmetic number, because the mean of its divisors is an integer number (60723).

2¹⁶¹⁹²⁶ is an apocalyptic number.

161926 is the 255-th centered pentagonal number.

161926 is a deficient number, since it is larger than the sum of its proper divisors (80966).

161926 is an equidigital number, since it uses as much as digits as its factorization.

161926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80965.

The product of its digits is 648, while the sum is 25.

The square root of 161926 is about 402.4002982106. The cubic root of 161926 is about 54.5053160934.

The spelling of 161926 in words is "one hundred sixty-one thousand, nine hundred twenty-six".