1263365 has 8 divisors (see below), whose sum is σ = 1557240. Its totient is φ = 983232.

The previous prime is 1263347. The next prime is 1263373. The reversal of 1263365 is 5633621.

It can be written as a sum of positive squares in 4 ways, for example, as 368449 + 894916 = 607^2 + 946^2 .

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 1263365 - 2⁸ = 1263109 is a prime.

It is a super-2 number, since 2×1263365² = 3192182246450, which contains 22 as substring.

It is a congruent 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, 3230 + ... + 3599.

It is an arithmetic number, because the mean of its divisors is an integer number (194655).

2^1263365 is an apocalyptic number.

It is an amenable number.

1263365 is a deficient number, since it is larger than the sum of its proper divisors (293875).

1263365 is an equidigital number, since it uses as much as digits as its factorization.

1263365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6871.

The product of its digits is 3240, while the sum is 26.

The square root of 1263365 is about 1123.9951067509. The cubic root of 1263365 is about 108.1042945417.

Adding to 1263365 its reverse (5633621), we get a palindrome (6896986).

The spelling of 1263365 in words is "one million, two hundred sixty-three thousand, three hundred sixty-five".