1263355 has 16 divisors (see below), whose sum is σ = 1632960. Its totient is φ = 934912.

The previous prime is 1263347. The next prime is 1263373. The reversal of 1263355 is 5533621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1263355 - 2³ = 1263347 is a prime.

It is a super-3 number, since 3×1263355³ = 6049193338615391625, which contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7482 + ... + 7648.

It is an arithmetic number, because the mean of its divisors is an integer number (102060).

2^1263355 is an apocalyptic number.

1263355 is a deficient number, since it is larger than the sum of its proper divisors (369605).

1263355 is a wasteful number, since it uses less digits than its factorization.

1263355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278.

The product of its digits is 2700, while the sum is 25.

The square root of 1263355 is about 1123.9906583242. The cubic root of 1263355 is about 108.1040093125.

Adding to 1263355 its reverse (5533621), we get a palindrome (6796976).

It can be divided in two parts, 126 and 3355, that added together give a square (3481 = 59²).

The spelling of 1263355 in words is "one million, two hundred sixty-three thousand, three hundred fifty-five".