1291224 has 64 divisors (see below), whose sum is σ = 3623040. Its totient is φ = 380160.

The previous prime is 1291223. The next prime is 1291229. The reversal of 1291224 is 4221921.

It is a self number, because there is not a number n which added to its sum of digits gives 1291224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17652 + ... + 17724.

It is an arithmetic number, because the mean of its divisors is an integer number (56610).

2^1291224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1291224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1811520).

1291224 is an abundant number, since it is smaller than the sum of its proper divisors (2331816).

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

1291224 is a wasteful number, since it uses less digits than its factorization.

1291224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 156 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 1291224 is about 1136.3203773584. The cubic root of 1291224 is about 108.8931421974.

The spelling of 1291224 in words is "one million, two hundred ninety-one thousand, two hundred twenty-four".