465221261 has 2 divisors, whose sum is σ = 465221262. Its totient is φ = 465221260.

The previous prime is 465221249. The next prime is 465221287. The reversal of 465221261 is 162122564.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 445463236 + 19758025 = 21106^2 + 4445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-465221261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (465221231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232610630 + 232610631.

It is an arithmetic number, because the mean of its divisors is an integer number (232610631).

Almost surely, 2^465221261 is an apocalyptic number.

It is an amenable number.

465221261 is a deficient number, since it is larger than the sum of its proper divisors (1).

465221261 is an equidigital number, since it uses as much as digits as its factorization.

465221261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 465221261 is about 21568.9884092880. The cubic root of 465221261 is about 774.8539501406.

The spelling of 465221261 in words is "four hundred sixty-five million, two hundred twenty-one thousand, two hundred sixty-one".