1266253853 has 4 divisors (see below), whose sum is σ = 1266562908. Its totient is φ = 1265944800.

The previous prime is 1266253843. The next prime is 1266253903. The reversal of 1266253853 is 3583526621.

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 590149849 + 676104004 = 24293^2 + 26002^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266253853 - 2¹⁰ = 1266252829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1266253853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266253843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148298 + ... + 156603.

It is an arithmetic number, because the mean of its divisors is an integer number (316640727).

Almost surely, 2^1266253853 is an apocalyptic number.

It is an amenable number.

1266253853 is a deficient number, since it is larger than the sum of its proper divisors (309055).

1266253853 is an equidigital number, since it uses as much as digits as its factorization.

1266253853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309054.

The product of its digits is 259200, while the sum is 41.

The square root of 1266253853 is about 35584.4608361571. The cubic root of 1266253853 is about 1081.8663012458.

The spelling of 1266253853 in words is "one billion, two hundred sixty-six million, two hundred fifty-three thousand, eight hundred fifty-three".