4561540 has 12 divisors (see below), whose sum is σ = 9579276. Its totient is φ = 1824608.

The previous prime is 4561523. The next prime is 4561547. The reversal of 4561540 is 451654.

It can be written as a sum of positive squares in 2 ways, for example, as 553536 + 4008004 = 744^2 + 2002^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4561547) 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, 114019 + ... + 114058.

It is an arithmetic number, because the mean of its divisors is an integer number (798273).

Almost surely, 2^4561540 is an apocalyptic number.

It is an amenable number.

4561540 is an abundant number, since it is smaller than the sum of its proper divisors (5017736).

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

4561540 is a wasteful number, since it uses less digits than its factorization.

4561540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228086 (or 228084 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 4561540 is about 2135.7762055047. The cubic root of 4561540 is about 165.8455523825.

The spelling of 4561540 in words is "four million, five hundred sixty-one thousand, five hundred forty".