1273297653 has 6 divisors (see below), whose sum is σ = 1839207734. Its totient is φ = 848865096.

The previous prime is 1273297651. The next prime is 1273297657. The reversal of 1273297653 is 3567923721.

It can be written as a sum of positive squares in only one way, i.e., 1198336689 + 74960964 = 34617^2 + 8658^2 .

It is not a de Polignac number, because 1273297653 - 2¹ = 1273297651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1273297599 and 1273297608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273297651) 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, 70738750 + ... + 70738767.

Almost surely, 2^1273297653 is an apocalyptic number.

It is an amenable number.

1273297653 is a deficient number, since it is larger than the sum of its proper divisors (565910081).

1273297653 is a wasteful number, since it uses less digits than its factorization.

1273297653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141477523 (or 141477520 counting only the distinct ones).

The product of its digits is 476280, while the sum is 45.

The square root of 1273297653 is about 35683.2965545506. The cubic root of 1273297653 is about 1083.8686283541.

The spelling of 1273297653 in words is "one billion, two hundred seventy-three million, two hundred ninety-seven thousand, six hundred fifty-three".