161276461 has 2 divisors, whose sum is σ = 161276462. Its totient is φ = 161276460.

The previous prime is 161276443. The next prime is 161276513. The reversal of 161276461 is 164672161.

161276461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160909225 + 367236 = 12685^2 + 606^2 .

It is a cyclic number.

It is not a de Polignac number, because 161276461 - 2⁷ = 161276333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161276261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80638230 + 80638231.

It is an arithmetic number, because the mean of its divisors is an integer number (80638231).

Almost surely, 2^161276461 is an apocalyptic number.

It is an amenable number.

161276461 is a deficient number, since it is larger than the sum of its proper divisors (1).

161276461 is an equidigital number, since it uses as much as digits as its factorization.

161276461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 161276461 is about 12699.4669573175. The cubic root of 161276461 is about 544.3233878182.

The spelling of 161276461 in words is "one hundred sixty-one million, two hundred seventy-six thousand, four hundred sixty-one".