161051249 has 2 divisors, whose sum is σ = 161051250. Its totient is φ = 161051248.

The previous prime is 161051207. The next prime is 161051257. The reversal of 161051249 is 942150161.

161051249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129049600 + 32001649 = 11360^2 + 5657^2 .

It is an emirp because it is prime and its reverse (942150161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161051249 - 2¹² = 161047153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161051299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80525624 + 80525625.

It is an arithmetic number, because the mean of its divisors is an integer number (80525625).

Almost surely, 2^161051249 is an apocalyptic number.

It is an amenable number.

161051249 is a deficient number, since it is larger than the sum of its proper divisors (1).

161051249 is an equidigital number, since it uses as much as digits as its factorization.

161051249 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 161051249 is about 12690.5968732759. The cubic root of 161051249 is about 544.0698991515.

The spelling of 161051249 in words is "one hundred sixty-one million, fifty-one thousand, two hundred forty-nine".