1391224120 has 96 divisors (see below), whose sum is σ = 3705528960. Its totient is φ = 466963200.

The previous prime is 1391224103. The next prime is 1391224139. The reversal of 1391224120 is 214221931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51865 + ... + 73975.

It is an arithmetic number, because the mean of its divisors is an integer number (38599260).

Almost surely, 2^1391224120 is an apocalyptic number.

1391224120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1391224120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1852764480).

1391224120 is an abundant number, since it is smaller than the sum of its proper divisors (2314304840).

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

1391224120 is a wasteful number, since it uses less digits than its factorization.

1391224120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22157 (or 22142 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1391224120 is about 37299.1168796260. The cubic root of 1391224120 is about 1116.3465455983.

The spelling of 1391224120 in words is "one billion, three hundred ninety-one million, two hundred twenty-four thousand, one hundred twenty".