1281392653 has 2 divisors, whose sum is σ = 1281392654. Its totient is φ = 1281392652.

The previous prime is 1281392627. The next prime is 1281392659. The reversal of 1281392653 is 3562931821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 775232649 + 506160004 = 27843^2 + 22498^2 .

It is a cyclic number.

It is not a de Polignac number, because 1281392653 - 2²⁹ = 744521741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1281392659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640696326 + 640696327.

It is an arithmetic number, because the mean of its divisors is an integer number (640696327).

Almost surely, 2^1281392653 is an apocalyptic number.

It is an amenable number.

1281392653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281392653 is an equidigital number, since it uses as much as digits as its factorization.

1281392653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 40.

The square root of 1281392653 is about 35796.5452662684. The cubic root of 1281392653 is about 1086.1606791051.

The spelling of 1281392653 in words is "one billion, two hundred eighty-one million, three hundred ninety-two thousand, six hundred fifty-three".