12501428 has 24 divisors (see below), whose sum is σ = 22536360. Its totient is φ = 6065280.

The previous prime is 12501427. The next prime is 12501473. The reversal of 12501428 is 82410521.

It can be written as a sum of positive squares in 4 ways, for example, as 3489424 + 9012004 = 1868^2 + 3002^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12501427) 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 7 ways as a sum of consecutive naturals, for example, 22838 + ... + 23378.

It is an arithmetic number, because the mean of its divisors is an integer number (939015).

Almost surely, 2^12501428 is an apocalyptic number.

It is an amenable number.

12501428 is a deficient number, since it is larger than the sum of its proper divisors (10034932).

12501428 is a wasteful number, since it uses less digits than its factorization.

12501428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707 (or 705 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 12501428 is about 3535.7358498621. The cubic root of 12501428 is about 232.0882789293.

Adding to 12501428 its reverse (82410521), we get a palindrome (94911949).

The spelling of 12501428 in words is "twelve million, five hundred one thousand, four hundred twenty-eight".