161245 has 16 divisors (see below), whose sum is σ = 235008. Its totient is φ = 103680.

The previous prime is 161237. The next prime is 161263. The reversal of 161245 is 542161.

161245 = T₁₄ + T₁₅ + ... + T₉₈.

It is not a de Polignac number, because 161245 - 2³ = 161237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 460 + ... + 730.

It is an arithmetic number, because the mean of its divisors is an integer number (14688).

2¹⁶¹²⁴⁵ is an apocalyptic number.

It is an amenable number.

161245 is a deficient number, since it is larger than the sum of its proper divisors (73763).

161245 is a wasteful number, since it uses less digits than its factorization.

161245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300.

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

The square root of 161245 is about 401.5532343289. The cubic root of 161245 is about 54.4287990895.

It can be divided in two parts, 16124 and 5, that added together give a square (16129 = 127²).

The spelling of 161245 in words is "one hundred sixty-one thousand, two hundred forty-five".