1391120 has 20 divisors (see below), whose sum is σ = 3234540. Its totient is φ = 556416.

The previous prime is 1391119. The next prime is 1391129. The reversal of 1391120 is 211931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 692224 + 698896 = 832^2 + 836^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 8615 + ... + 8774.

It is an arithmetic number, because the mean of its divisors is an integer number (161727).

2^1391120 is an apocalyptic number.

1391120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1391120 is an abundant number, since it is smaller than the sum of its proper divisors (1843420).

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

1391120 is a wasteful number, since it uses less digits than its factorization.

1391120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17402 (or 17396 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1391120 is about 1179.4575024137. The cubic root of 1391120 is about 111.6318695568.

It can be divided in two parts, 13911 and 20, that added together give a palindrome (13931).

The spelling of 1391120 in words is "one million, three hundred ninety-one thousand, one hundred twenty".