1272362653 has 4 divisors (see below), whose sum is σ = 1272819708. Its totient is φ = 1271905600.

The previous prime is 1272362639. The next prime is 1272362669. The reversal of 1272362653 is 3562632721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3562632721 = 41 ⋅86893481.

It can be written as a sum of positive squares in 2 ways, for example, as 754436089 + 517926564 = 27467^2 + 22758^2 .

It is a cyclic number.

It is not a de Polignac number, because 1272362653 - 2⁵ = 1272362621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272362453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224326 + ... + 229927.

It is an arithmetic number, because the mean of its divisors is an integer number (318204927).

Almost surely, 2^1272362653 is an apocalyptic number.

It is an amenable number.

1272362653 is a deficient number, since it is larger than the sum of its proper divisors (457055).

1272362653 is an equidigital number, since it uses as much as digits as its factorization.

1272362653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457054.

The product of its digits is 90720, while the sum is 37.

The square root of 1272362653 is about 35670.1927805276. The cubic root of 1272362653 is about 1083.6032635035.

The spelling of 1272362653 in words is "one billion, two hundred seventy-two million, three hundred sixty-two thousand, six hundred fifty-three".