1531560 has 32 divisors (see below), whose sum is σ = 4595040. Its totient is φ = 408384.

The previous prime is 1531549. The next prime is 1531561. The reversal of 1531560 is 651351.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1531561) 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, 6262 + ... + 6501.

It is an arithmetic number, because the mean of its divisors is an integer number (143595).

2^1531560 is an apocalyptic number.

1531560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1531560 is an abundant number, since it is smaller than the sum of its proper divisors (3063480).

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

1531560 is a wasteful number, since it uses less digits than its factorization.

1531560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12777 (or 12773 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1531560 is about 1237.5621196530. The cubic root of 1531560 is about 115.2686849277.

The spelling of 1531560 in words is "one million, five hundred thirty-one thousand, five hundred sixty".