1263040 has 28 divisors (see below), whose sum is σ = 3008376. Its totient is φ = 505088.

The previous prime is 1263007. The next prime is 1263047. The reversal of 1263040 is 403621.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263047) 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, 1654 + ... + 2293.

It is an arithmetic number, because the mean of its divisors is an integer number (107442).

2^1263040 is an apocalyptic number.

1263040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263040 is an abundant number, since it is smaller than the sum of its proper divisors (1745336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1263040 is an equidigital number, since it uses as much as digits as its factorization.

1263040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3964 (or 3954 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1263040 is about 1123.8505238687. The cubic root of 1263040 is about 108.0950238219.

Adding to 1263040 its reverse (403621), we get a palindrome (1666661).

The spelling of 1263040 in words is "one million, two hundred sixty-three thousand, forty".