45012500 has 72 divisors (see below), whose sum is σ = 106415064. Its totient is φ = 16560000.

The previous prime is 45012491. The next prime is 45012523. The reversal of 45012500 is 521054.

45012500 is digitally balanced in base 2 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 40119556 + 4892944 = 6334^2 + 2212^2 .

It is a super-2 number, since 2×45012500² = 4052250312500000, which contains 22 as substring.

45012500 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162362 + ... + 162638.

It is an arithmetic number, because the mean of its divisors is an integer number (1477987).

Almost surely, 2^45012500 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 45012500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53207532).

45012500 is an abundant number, since it is smaller than the sum of its proper divisors (61402564).

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

45012500 is a wasteful number, since it uses less digits than its factorization.

45012500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 45012500 is about 6709.1355627979. The cubic root of 45012500 is about 355.7222615973.

Adding to 45012500 its reverse (521054), we get a palindrome (45533554).

The spelling of 45012500 in words is "forty-five million, twelve thousand, five hundred".