464581261 has 2 divisors, whose sum is σ = 464581262. Its totient is φ = 464581260.

The previous prime is 464581259. The next prime is 464581279. The reversal of 464581261 is 162185464.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376127236 + 88454025 = 19394^2 + 9405^2 .

It is a cyclic number.

It is not a de Polignac number, because 464581261 - 2¹ = 464581259 is a prime.

Together with 464581259, 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 464581261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (464581211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232290630 + 232290631.

It is an arithmetic number, because the mean of its divisors is an integer number (232290631).

Almost surely, 2^464581261 is an apocalyptic number.

It is an amenable number.

464581261 is a deficient number, since it is larger than the sum of its proper divisors (1).

464581261 is an equidigital number, since it uses as much as digits as its factorization.

464581261 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 464581261 is about 21554.1471879543. The cubic root of 464581261 is about 774.4984676006.

The spelling of 464581261 in words is "four hundred sixty-four million, five hundred eighty-one thousand, two hundred sixty-one".