1298562722 has 18 divisors (see below), whose sum is σ = 1978037883. Its totient is φ = 639369252.

The previous prime is 1298562721. The next prime is 1298562781. The reversal of 1298562722 is 2272658921.

It can be written as a sum of positive squares in only one way, i.e., 649281361 + 649281361 = 25481^2 + 25481^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=25481.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1298562721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4229693 + ... + 4229999.

Almost surely, 2^1298562722 is an apocalyptic number.

1298562722 is a deficient number, since it is larger than the sum of its proper divisors (679475161).

1298562722 is an frugal number, since it uses more digits than its factorization.

1298562722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782 (or 392 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The square root of 1298562722 is about 36035.5757828288. The cubic root of 1298562722 is about 1090.9905206434.

The spelling of 1298562722 in words is "one billion, two hundred ninety-eight million, five hundred sixty-two thousand, seven hundred twenty-two".