145920161 has 2 divisors, whose sum is σ = 145920162. Its totient is φ = 145920160.

The previous prime is 145920149. The next prime is 145920167. The reversal of 145920161 is 161029541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106481761 + 39438400 = 10319^2 + 6280^2 .

It is a cyclic number.

It is not a de Polignac number, because 145920161 - 2¹⁴ = 145903777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145920167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72960080 + 72960081.

It is an arithmetic number, because the mean of its divisors is an integer number (72960081).

Almost surely, 2^145920161 is an apocalyptic number.

It is an amenable number.

145920161 is a deficient number, since it is larger than the sum of its proper divisors (1).

145920161 is an equidigital number, since it uses as much as digits as its factorization.

145920161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 145920161 is about 12079.7417604848. The cubic root of 145920161 is about 526.4677428442.

The spelling of 145920161 in words is "one hundred forty-five million, nine hundred twenty thousand, one hundred sixty-one".