1263536 has 20 divisors (see below), whose sum is σ = 2468592. Its totient is φ = 626496.

The previous prime is 1263511. The next prime is 1263539. The reversal of 1263536 is 6353621.

1263536 = T₄₀ + T₄₁ + ... + T₁₉₆.

1263536 is nontrivially palindromic in base 7.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2261 + ... + 2763.

2^1263536 is an apocalyptic number.

1263536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1263536 is a deficient number, since it is larger than the sum of its proper divisors (1205056).

1263536 is a wasteful number, since it uses less digits than its factorization.

1263536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 662 counting only the distinct ones).

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

The square root of 1263536 is about 1124.0711721239. The cubic root of 1263536 is about 108.1091717283.

The spelling of 1263536 in words is "one million, two hundred sixty-three thousand, five hundred thirty-six".