1144020 has 48 divisors (see below), whose sum is σ = 3346560. Its totient is φ = 291456.

The previous prime is 1144019. The next prime is 1144037. The reversal of 1144020 is 204411.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1143987 and 1144005.

It is a congruent number.

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, 966 + ... + 1794.

It is an arithmetic number, because the mean of its divisors is an integer number (69720).

2^1144020 is an apocalyptic number.

1144020 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 1144020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1673280).

1144020 is an abundant number, since it is smaller than the sum of its proper divisors (2202540).

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

1144020 is a wasteful number, since it uses less digits than its factorization.

1144020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1144020 is about 1069.5887059987. The cubic root of 1144020 is about 104.5870401096.

Adding to 1144020 its reverse (204411), we get a palindrome (1348431).

The spelling of 1144020 in words is "one million, one hundred forty-four thousand, twenty".