145403161 has 2 divisors, whose sum is σ = 145403162. Its totient is φ = 145403160.

The previous prime is 145403123. The next prime is 145403173. The reversal of 145403161 is 161304541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126697536 + 18705625 = 11256^2 + 4325^2 .

It is an emirp because it is prime and its reverse (161304541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145403161 - 2¹³ = 145394969 is a prime.

It is a super-2 number, since 2×145403161² = 42284158457583842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145403191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72701580 + 72701581.

It is an arithmetic number, because the mean of its divisors is an integer number (72701581).

Almost surely, 2^145403161 is an apocalyptic number.

It is an amenable number.

145403161 is a deficient number, since it is larger than the sum of its proper divisors (1).

145403161 is an equidigital number, since it uses as much as digits as its factorization.

145403161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 145403161 is about 12058.3233079894. The cubic root of 145403161 is about 525.8452428243.

The spelling of 145403161 in words is "one hundred forty-five million, four hundred three thousand, one hundred sixty-one".