145771 has 2 divisors, whose sum is σ = 145772. Its totient is φ = 145770.

The previous prime is 145759. The next prime is 145777. The reversal of 145771 is 177541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145771 - 2⁷ = 145643 is a prime.

It is equal to p₁₃₄₈₉ and since 145771 and 13489 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (145777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72885 + 72886.

It is an arithmetic number, because the mean of its divisors is an integer number (72886).

2¹⁴⁵⁷⁷¹ is an apocalyptic number.

145771 is a deficient number, since it is larger than the sum of its proper divisors (1).

145771 is an equidigital number, since it uses as much as digits as its factorization.

145771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 980, while the sum is 25.

The square root of 145771 is about 381.7996856992. The cubic root of 145771 is about 52.6288294880.

The spelling of 145771 in words is "one hundred forty-five thousand, seven hundred seventy-one".