1236144 has 80 divisors (see below), whose sum is σ = 3944192. Its totient is φ = 324864.

The previous prime is 1236077. The next prime is 1236161. The reversal of 1236144 is 4416321.

It is a Harshad number since it is a multiple of its sum of digits (21).

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

It is a self number, because there is not a number n which added to its sum of digits gives 1236144.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4227 + ... + 4509.

2^1236144 is an apocalyptic number.

1236144 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 1236144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1972096).

1236144 is an abundant number, since it is smaller than the sum of its proper divisors (2708048).

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

1236144 is a wasteful number, since it uses less digits than its factorization.

1236144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 308 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 1236144 is about 1111.8201293375. The cubic root of 1236144 is about 107.3222300754.

The spelling of 1236144 in words is "one million, two hundred thirty-six thousand, one hundred forty-four".