1391424 has 28 divisors (see below), whose sum is σ = 3681984. Its totient is φ = 463744.

The previous prime is 1391419. The next prime is 1391441. The reversal of 1391424 is 4241931.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 1391394 and 1391403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3432 + ... + 3815.

2^1391424 is an apocalyptic number.

It is an amenable number.

1391424 is an abundant number, since it is smaller than the sum of its proper divisors (2290560).

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

1391424 is an equidigital number, since it uses as much as digits as its factorization.

1391424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7262 (or 7252 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 1391424 is about 1179.5863681817. The cubic root of 1391424 is about 111.6400005631.

The spelling of 1391424 in words is "one million, three hundred ninety-one thousand, four hundred twenty-four".