1391124 has 24 divisors (see below), whose sum is σ = 3709888. Its totient is φ = 397440.

The previous prime is 1391119. The next prime is 1391129. The reversal of 1391124 is 4211931.

It is an interprime number because it is at equal distance from previous prime (1391119) and next prime (1391129).

It is a Harshad number since it is a multiple of its sum of digits (21).

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 1391124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391129) 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, 8197 + ... + 8364.

2^1391124 is an apocalyptic number.

1391124 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1391124 is an abundant number, since it is smaller than the sum of its proper divisors (2318764).

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

1391124 is a wasteful number, since it uses less digits than its factorization.

1391124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16575 (or 16573 counting only the distinct ones).

The product of its digits is 216, while the sum is 21.

The square root of 1391124 is about 1179.4591981073. The cubic root of 1391124 is about 111.6319765514.

The spelling of 1391124 in words is "one million, three hundred ninety-one thousand, one hundred twenty-four".