1531120 has 20 divisors (see below), whose sum is σ = 3560040. Its totient is φ = 612416.

The previous prime is 1531111. The next prime is 1531129. The reversal of 1531120 is 211351.

It is an interprime number because it is at equal distance from previous prime (1531111) and next prime (1531129).

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

It is a self number, because there is not a number n which added to its sum of digits gives 1531120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531129) 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, 9490 + ... + 9649.

It is an arithmetic number, because the mean of its divisors is an integer number (178002).

2^1531120 is an apocalyptic number.

1531120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1531120 is an abundant number, since it is smaller than the sum of its proper divisors (2028920).

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

1531120 is a wasteful number, since it uses less digits than its factorization.

1531120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19152 (or 19146 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 1531120 is about 1237.3843380292. The cubic root of 1531120 is about 115.2576454039.

Adding to 1531120 its reverse (211351), we get a palindrome (1742471).

The spelling of 1531120 in words is "one million, five hundred thirty-one thousand, one hundred twenty".