4521540 has 48 divisors (see below), whose sum is σ = 12761280. Its totient is φ = 1196160.

The previous prime is 4521533. The next prime is 4521551. The reversal of 4521540 is 451254.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10530 + ... + 10950.

It is an arithmetic number, because the mean of its divisors is an integer number (265860).

Almost surely, 2^4521540 is an apocalyptic number.

It is an amenable number.

4521540 is an abundant number, since it is smaller than the sum of its proper divisors (8239740).

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

4521540 is a wasteful number, since it uses less digits than its factorization.

4521540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 4521540 is about 2126.3913092373. The cubic root of 4521540 is about 165.3593636753.

Adding to 4521540 its reverse (451254), we get a palindrome (4972794).

The spelling of 4521540 in words is "four million, five hundred twenty-one thousand, five hundred forty".