12501478 has 12 divisors (see below), whose sum is σ = 20612340. Its totient is φ = 5682380.

The previous prime is 12501473. The next prime is 12501479. The reversal of 12501478 is 87410521.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12501473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25588 + ... + 26071.

It is an arithmetic number, because the mean of its divisors is an integer number (1717695).

Almost surely, 2^12501478 is an apocalyptic number.

12501478 is a deficient number, since it is larger than the sum of its proper divisors (8110862).

12501478 is a wasteful number, since it uses less digits than its factorization.

12501478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51683 (or 51672 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 12501478 is about 3535.7429205190. The cubic root of 12501478 is about 232.0885883445.

Adding to 12501478 its reverse (87410521), we get a palindrome (99911999).

The spelling of 12501478 in words is "twelve million, five hundred one thousand, four hundred seventy-eight".