1253022805 has 4 divisors (see below), whose sum is σ = 1503627372. Its totient is φ = 1002418240.

The previous prime is 1253022737. The next prime is 1253022829. The reversal of 1253022805 is 5082203521.

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 617075281 + 635947524 = 24841^2 + 25218^2 .

It is not a de Polignac number, because 1253022805 - 2¹³ = 1253014613 is a prime.

It is a super-2 number, since 2×1253022805² = 3140132299700136050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125302276 + ... + 125302285.

It is an arithmetic number, because the mean of its divisors is an integer number (375906843).

Almost surely, 2^1253022805 is an apocalyptic number.

It is an amenable number.

1253022805 is a deficient number, since it is larger than the sum of its proper divisors (250604567).

1253022805 is an equidigital number, since it uses as much as digits as its factorization.

1253022805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250604566.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1253022805 is about 35398.0621644745. The cubic root of 1253022805 is about 1078.0849708081.

The spelling of 1253022805 in words is "one billion, two hundred fifty-three million, twenty-two thousand, eight hundred five".