1222631461 has 2 divisors, whose sum is σ = 1222631462. Its totient is φ = 1222631460.

The previous prime is 1222631419. The next prime is 1222631489. The reversal of 1222631461 is 1641362221.

It is an a-pointer prime, because the next prime (1222631489) can be obtained adding 1222631461 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1205408961 + 17222500 = 34719^2 + 4150^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222631461 - 2¹¹ = 1222629413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222631161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611315730 + 611315731.

It is an arithmetic number, because the mean of its divisors is an integer number (611315731).

Almost surely, 2^1222631461 is an apocalyptic number.

It is an amenable number.

1222631461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222631461 is an equidigital number, since it uses as much as digits as its factorization.

1222631461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 1222631461 is about 34966.1473571224. The cubic root of 1222631461 is about 1069.2974282669.

Adding to 1222631461 its reverse (1641362221), we get a palindrome (2863993682).

The spelling of 1222631461 in words is "one billion, two hundred twenty-two million, six hundred thirty-one thousand, four hundred sixty-one".