1222247457 has 6 divisors (see below), whose sum is σ = 1765468562. Its totient is φ = 814831632.

The previous prime is 1222247443. The next prime is 1222247461. The reversal of 1222247457 is 7547422221.

It can be written as a sum of positive squares in only one way, i.e., 1123523361 + 98724096 = 33519^2 + 9936^2 .

It is not a de Polignac number, because 1222247457 - 2⁷ = 1222247329 is a prime.

It is a super-2 number, since 2×1222247457² = 2987777692285933698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222247857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67902628 + ... + 67902645.

Almost surely, 2^1222247457 is an apocalyptic number.

It is an amenable number.

1222247457 is a deficient number, since it is larger than the sum of its proper divisors (543221105).

1222247457 is a wasteful number, since it uses less digits than its factorization.

1222247457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135805279 (or 135805276 counting only the distinct ones).

The product of its digits is 62720, while the sum is 36.

The square root of 1222247457 is about 34960.6558433906. The cubic root of 1222247457 is about 1069.1854682585.

Adding to 1222247457 its reverse (7547422221), we get a palindrome (8769669678).

The spelling of 1222247457 in words is "one billion, two hundred twenty-two million, two hundred forty-seven thousand, four hundred fifty-seven".