12500000 has 54 divisors (see below), whose sum is σ = 30761703. Its totient is φ = 5000000.

The previous prime is 12499999. The next prime is 12500003. The reversal of 12500000 is 521.

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.

12500000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 11916304 + 583696 = 3452^2 + 764^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2500.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12500003) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2499998 + ... + 2500002.

Almost surely, 2^12500000 is an apocalyptic number.

12500000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12500000

12500000 is an abundant number, since it is smaller than the sum of its proper divisors (18261703).

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

12500000 is an frugal number, since it uses more digits than its factorization.

12500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50 (or 7 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 8.

The square root of 12500000 is about 3535.5339059327. The cubic root of 12500000 is about 232.0794416806.

Multiplying 12500000 by its product of nonzero digits (10), we get a cube (125000000 = 500³).

Adding to 12500000 its reverse (521), we get a palindrome (12500521).

The spelling of 12500000 in words is "twelve million, five hundred thousand".