145161 has 9 divisors (see below), whose sum is σ = 211341. Its totient is φ = 96012.

The previous prime is 145139. The next prime is 145177. The reversal of 145161 is 161541.

145161 = T₃₈₀ + T₃₈₁.

The square root of 145161 is 381.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 145161 - 2¹¹ = 143113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145121) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1080 + ... + 1206.

2¹⁴⁵¹⁶¹ is an apocalyptic number.

145161 is the 381-st square number.

145161 is the 191-st centered octagonal number.

It is an amenable number.

145161 is a deficient number, since it is larger than the sum of its proper divisors (66180).

145161 is an equidigital number, since it uses as much as digits as its factorization.

145161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 130 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The cubic root of 145161 is about 52.5553158465. Note that the first 3 decimals are identical.

The spelling of 145161 in words is "one hundred forty-five thousand, one hundred sixty-one".