1263827485 has 4 divisors (see below), whose sum is σ = 1516592988. Its totient is φ = 1011061984.

The previous prime is 1263827479. The next prime is 1263827507. The reversal of 1263827485 is 5847283621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5847283621 = 919 ⋅6362659.

It can be written as a sum of positive squares in 2 ways, for example, as 288014841 + 975812644 = 16971^2 + 31238^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263827485 - 2²¹ = 1261730333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126382744 + ... + 126382753.

It is an arithmetic number, because the mean of its divisors is an integer number (379148247).

Almost surely, 2^1263827485 is an apocalyptic number.

It is an amenable number.

1263827485 is a deficient number, since it is larger than the sum of its proper divisors (252765503).

1263827485 is an equidigital number, since it uses as much as digits as its factorization.

1263827485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252765502.

The product of its digits is 645120, while the sum is 46.

The square root of 1263827485 is about 35550.3514047330. The cubic root of 1263827485 is about 1081.1748432062.

The spelling of 1263827485 in words is "one billion, two hundred sixty-three million, eight hundred twenty-seven thousand, four hundred eighty-five".