3540520 has 16 divisors (see below), whose sum is σ = 7966260. Its totient is φ = 1416192.

The previous prime is 3540503. The next prime is 3540521. The reversal of 3540520 is 250453.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3481956 + 58564 = 1866^2 + 242^2 .

It is not an unprimeable number, because it can be changed into a prime (3540521) 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, 44217 + ... + 44296.

Almost surely, 2^3540520 is an apocalyptic number.

It is an amenable number.

3540520 is an abundant number, since it is smaller than the sum of its proper divisors (4425740).

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

3540520 is a wasteful number, since it uses less digits than its factorization.

3540520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88524 (or 88520 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 3540520 is about 1881.6269555892. The cubic root of 3540520 is about 152.4131190154.

Adding to 3540520 its reverse (250453), we get a palindrome (3790973).

The spelling of 3540520 in words is "three million, five hundred forty thousand, five hundred twenty".