740161 has 2 divisors, whose sum is σ = 740162. Its totient is φ = 740160.

The previous prime is 740153. The next prime is 740171. The reversal of 740161 is 161047.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 680625 + 59536 = 825^2 + 244^2 .

It is an emirp because it is prime and its reverse (161047) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 740161 - 2³ = 740153 is a prime.

It is not a weakly prime, because it can be changed into another prime (740141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 370080 + 370081.

It is an arithmetic number, because the mean of its divisors is an integer number (370081).

2⁷⁴⁰¹⁶¹ is an apocalyptic number.

It is an amenable number.

740161 is a deficient number, since it is larger than the sum of its proper divisors (1).

740161 is an equidigital number, since it uses as much as digits as its factorization.

740161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 740161 is about 860.3261009640. The cubic root of 740161 is about 90.4569761818.

The spelling of 740161 in words is "seven hundred forty thousand, one hundred sixty-one".