1244920 has 16 divisors (see below), whose sum is σ = 2801160. Its totient is φ = 497952.

The previous prime is 1244911. The next prime is 1244923. The reversal of 1244920 is 294421.

It is a junction number, because it is equal to n+sod(n) for n = 1244891 and 1244900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15522 + ... + 15601.

2^1244920 is an apocalyptic number.

1244920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244920 is an abundant number, since it is smaller than the sum of its proper divisors (1556240).

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

1244920 is a wasteful number, since it uses less digits than its factorization.

1244920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31134 (or 31130 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1244920 is about 1115.7598307880. The cubic root of 1244920 is about 107.5756093286.

The spelling of 1244920 in words is "one million, two hundred forty-four thousand, nine hundred twenty".