1263900 has 72 divisors (see below), whose sum is σ = 3999744. Its totient is φ = 305600.

The previous prime is 1263887. The next prime is 1263917. The reversal of 1263900 is 93621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3109 + ... + 3491.

It is an arithmetic number, because the mean of its divisors is an integer number (55552).

2^1263900 is an apocalyptic number.

1263900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1263900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1999872).

1263900 is an abundant number, since it is smaller than the sum of its proper divisors (2735844).

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

1263900 is a wasteful number, since it uses less digits than its factorization.

1263900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 1263900 is about 1124.2330719206. The cubic root of 1263900 is about 108.1195521106.

It can be divided in two parts, 1 and 263900, that added together give a triangular number (263901 = T₇₂₆).

The spelling of 1263900 in words is "one million, two hundred sixty-three thousand, nine hundred".