30012500 has 90 divisors (see below), whose sum is σ = 76584942. Its totient is φ = 10290000.

The previous prime is 30012487. The next prime is 30012503. The reversal of 30012500 is 521003.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 3 ways, for example, as 13868176 + 16144324 = 3724^2 + 4018^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30012503) by changing a digit.

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 29 ways as a sum of consecutive naturals, for example, 4287497 + ... + 4287503.

Almost surely, 2^30012500 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 30012500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38292471).

30012500 is an abundant number, since it is smaller than the sum of its proper divisors (46572442).

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

30012500 is an frugal number, since it uses more digits than its factorization.

30012500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57 (or 14 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 30012500 is about 5478.3665448745. The cubic root of 30012500 is about 310.7664006099.

Adding to 30012500 its reverse (521003), we get a palindrome (30533503).

The spelling of 30012500 in words is "thirty million, twelve thousand, five hundred".