1263385 has 8 divisors (see below), whose sum is σ = 1568520. Its totient is φ = 975744.

The previous prime is 1263377. The next prime is 1263391. The reversal of 1263385 is 5833621.

It can be written as a sum of positive squares in 4 ways, for example, as 451584 + 811801 = 672^2 + 901^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1263385 - 2³ = 1263377 is a prime.

It is a super-2 number, since 2×1263385² = 3192283316450, which contains 22 as substring.

1263385 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4212 + ... + 4501.

It is an arithmetic number, because the mean of its divisors is an integer number (196065).

2^1263385 is an apocalyptic number.

It is an amenable number.

1263385 is a deficient number, since it is larger than the sum of its proper divisors (305135).

1263385 is an equidigital number, since it uses as much as digits as its factorization.

1263385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8747.

The product of its digits is 4320, while the sum is 28.

The square root of 1263385 is about 1124.0040035516. The cubic root of 1263385 is about 108.1048649956.

The spelling of 1263385 in words is "one million, two hundred sixty-three thousand, three hundred eighty-five".