161250 has 40 divisors (see below), whose sum is σ = 412368. Its totient is φ = 42000.

The previous prime is 161237. The next prime is 161263. The reversal of 161250 is 52161.

It is an interprime number because it is at equal distance from previous prime (161237) and next prime (161263).

It is a Harshad number since it is a multiple of its sum of digits (15).

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3729 + ... + 3771.

2¹⁶¹²⁵⁰ is an apocalyptic number.

161250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161250 is the 215-th nonagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206184).

161250 is an abundant number, since it is smaller than the sum of its proper divisors (251118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161250 is an equidigital number, since it uses as much as digits as its factorization.

161250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 161250 is about 401.5594601052. The cubic root of 161250 is about 54.4293616726.

The spelling of 161250 in words is "one hundred sixty-one thousand, two hundred fifty".