4540500 has 72 divisors (see below), whose sum is σ = 14337960. Its totient is φ = 1209600.

The previous prime is 4540493. The next prime is 4540507. The reversal of 4540500 is 50454.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4540493) and next prime (4540507).

It can be written as a sum of positive squares in 4 ways, for example, as 427716 + 4112784 = 654^2 + 2028^2 .

It is a super-2 number, since 2×4540500² = 41232280500000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4540507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3996 + ... + 5004.

Almost surely, 2^4540500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4540500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7168980).

4540500 is an abundant number, since it is smaller than the sum of its proper divisors (9797460).

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

4540500 is a wasteful number, since it uses less digits than its factorization.

4540500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034 (or 1019 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 4540500 is about 2130.8449028496. The cubic root of 4540500 is about 165.5901730499.

Adding to 4540500 its reverse (50454), we get a palindrome (4590954).

It can be divided in two parts, 45 and 40500, that multiplied together give a square (1822500 = 1350²).

The spelling of 4540500 in words is "four million, five hundred forty thousand, five hundred".