161254 has 4 divisors (see below), whose sum is σ = 241884. Its totient is φ = 80626.

The previous prime is 161237. The next prime is 161263. The reversal of 161254 is 452161.

It is a semiprime because it is the product of two primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

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, 40312 + ... + 40315.

It is an arithmetic number, because the mean of its divisors is an integer number (60471).

2¹⁶¹²⁵⁴ is an apocalyptic number.

161254 is a deficient number, since it is larger than the sum of its proper divisors (80630).

161254 is an equidigital number, since it uses as much as digits as its factorization.

161254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80629.

The product of its digits is 240, while the sum is 19.

The square root of 161254 is about 401.5644406568. The cubic root of 161254 is about 54.4298117308.

It can be divided in two parts, 16125 and 4, that added together give a square (16129 = 127²).

The spelling of 161254 in words is "one hundred sixty-one thousand, two hundred fifty-four".