1263535 has 16 divisors (see below), whose sum is σ = 1866816. Its totient is φ = 799488.

The previous prime is 1263511. The next prime is 1263539. The reversal of 1263535 is 5353621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1263535 - 2⁵ = 1263503 is a prime.

It is a super-3 number, since 3×1263535³ = 6051779333713966125, which contains 333 as substring.

1263535 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263539) by changing a digit.

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, 934 + ... + 1843.

It is an arithmetic number, because the mean of its divisors is an integer number (116676).

2^1263535 is an apocalyptic number.

1263535 is a deficient number, since it is larger than the sum of its proper divisors (603281).

1263535 is a wasteful number, since it uses less digits than its factorization.

1263535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802.

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

The square root of 1263535 is about 1124.0707273121. The cubic root of 1263535 is about 108.1091432080.

It can be divided in two parts, 12635 and 35, that multiplied together give a square (442225 = 665²).

The spelling of 1263535 in words is "one million, two hundred sixty-three thousand, five hundred thirty-five".