1263544 has 16 divisors (see below), whose sum is σ = 2410200. Its totient is φ = 620832.

The previous prime is 1263541. The next prime is 1263547. The reversal of 1263544 is 4453621.

It is an interprime number because it is at equal distance from previous prime (1263541) and next prime (1263547).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 867 + ... + 1810.

2^1263544 is an apocalyptic number.

It is an amenable number.

1263544 is a deficient number, since it is larger than the sum of its proper divisors (1146656).

1263544 is a wasteful number, since it uses less digits than its factorization.

1263544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742 (or 2738 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 1263544 is about 1124.0747306118. The cubic root of 1263544 is about 108.1093998900.

The spelling of 1263544 in words is "one million, two hundred sixty-three thousand, five hundred forty-four".