461842561 has 2 divisors, whose sum is σ = 461842562. Its totient is φ = 461842560.

The previous prime is 461842559. The next prime is 461842643. The reversal of 461842561 is 165248164.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398241936 + 63600625 = 19956^2 + 7975^2 .

It is a cyclic number.

It is not a de Polignac number, because 461842561 - 2¹ = 461842559 is a prime.

Together with 461842559, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 461842561.

It is not a weakly prime, because it can be changed into another prime (461842261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230921280 + 230921281.

It is an arithmetic number, because the mean of its divisors is an integer number (230921281).

Almost surely, 2^461842561 is an apocalyptic number.

It is an amenable number.

461842561 is a deficient number, since it is larger than the sum of its proper divisors (1).

461842561 is an equidigital number, since it uses as much as digits as its factorization.

461842561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 37.

The square root of 461842561 is about 21490.5225855492. The cubic root of 461842561 is about 772.9735814114.

The spelling of 461842561 in words is "four hundred sixty-one million, eight hundred forty-two thousand, five hundred sixty-one".