1420824 has 32 divisors (see below), whose sum is σ = 3622320. Its totient is φ = 464256.

The previous prime is 1420819. The next prime is 1420831. The reversal of 1420824 is 4280241.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1420824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 714 + ... + 1830.

2^1420824 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 1420824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1811160).

1420824 is an abundant number, since it is smaller than the sum of its proper divisors (2201496).

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

1420824 is a wasteful number, since it uses less digits than its factorization.

1420824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179 (or 1175 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1420824 is about 1191.9832213584. The cubic root of 1420824 is about 112.4208233014.

The spelling of 1420824 in words is "one million, four hundred twenty thousand, eight hundred twenty-four".