1244420 has 24 divisors (see below), whose sum is σ = 2675904. Its totient is φ = 485856.

The previous prime is 1244401. The next prime is 1244423. The reversal of 1244420 is 244421.

It is a super-2 number, since 2×1244420² = 3097162272800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1244423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137 + ... + 1583.

It is an arithmetic number, because the mean of its divisors is an integer number (111496).

2^1244420 is an apocalyptic number.

1244420 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 1244420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1337952).

1244420 is an abundant number, since it is smaller than the sum of its proper divisors (1431484).

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

1244420 is a wasteful number, since it uses less digits than its factorization.

1244420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499 (or 1497 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 1244420 is about 1115.5357457294. The cubic root of 1244420 is about 107.5612054559.

Adding to 1244420 its reverse (244421), we get a palindrome (1488841).

Subtracting from 1244420 its reverse (244421), we obtain a palindrome (999999).

The spelling of 1244420 in words is "one million, two hundred forty-four thousand, four hundred twenty".