1265222653 has 4 divisors (see below), whose sum is σ = 1265541948. Its totient is φ = 1264903360.

The previous prime is 1265222639. The next prime is 1265222689. The reversal of 1265222653 is 3562225621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1168750969 + 96471684 = 34187^2 + 9822^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1265222653 is a prime.

It is a super-3 number, since 3×1265222653³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265222633) 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, 153628 + ... + 161653.

It is an arithmetic number, because the mean of its divisors is an integer number (316385487).

Almost surely, 2^1265222653 is an apocalyptic number.

It is an amenable number.

1265222653 is a deficient number, since it is larger than the sum of its proper divisors (319295).

1265222653 is an equidigital number, since it uses as much as digits as its factorization.

1265222653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319294.

The product of its digits is 43200, while the sum is 34.

The square root of 1265222653 is about 35569.9684143801. The cubic root of 1265222653 is about 1081.5725414263.

The spelling of 1265222653 in words is "one billion, two hundred sixty-five million, two hundred twenty-two thousand, six hundred fifty-three".