1532540 has 48 divisors (see below), whose sum is σ = 3511200. Its totient is φ = 559872.

The previous prime is 1532507. The next prime is 1532543. The reversal of 1532540 is 452351.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1532543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14006 + ... + 14114.

It is an arithmetic number, because the mean of its divisors is an integer number (73150).

2^1532540 is an apocalyptic number.

1532540 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 1532540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1755600).

1532540 is an abundant number, since it is smaller than the sum of its proper divisors (1978660).

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

1532540 is a wasteful number, since it uses less digits than its factorization.

1532540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 1532540 is about 1237.9579960564. The cubic root of 1532540 is about 115.2932653611.

Adding to 1532540 its reverse (452351), we get a palindrome (1984891).

The spelling of 1532540 in words is "one million, five hundred thirty-two thousand, five hundred forty".