1263444 has 72 divisors (see below), whose sum is σ = 3689280. Its totient is φ = 329472.

The previous prime is 1263403. The next prime is 1263461. The reversal of 1263444 is 4443621.

It is a super-2 number, since 2×1263444² = 3192581482272, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 14152 + ... + 14240.

It is an arithmetic number, because the mean of its divisors is an integer number (51240).

2^1263444 is an apocalyptic number.

1263444 is a gapful number since it is divisible by the number (14) 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 1263444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1844640).

1263444 is an abundant number, since it is smaller than the sum of its proper divisors (2425836).

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

1263444 is a wasteful number, since it uses less digits than its factorization.

1263444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 114 counting only the distinct ones).

The product of its digits is 2304, while the sum is 24.

The square root of 1263444 is about 1124.0302487033. The cubic root of 1263444 is about 108.1065477996.

It can be divided in two parts, 126 and 3444, that added together give a triangular number (3570 = T₈₄).

The spelling of 1263444 in words is "one million, two hundred sixty-three thousand, four hundred forty-four".