12534478 has 16 divisors (see below), whose sum is σ = 21173760. Its totient is φ = 5513400.

The previous prime is 12534461. The next prime is 12534523. The reversal of 12534478 is 87443521.

It is a super-2 number, since 2×12534478² = 314226277464968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8508 + ... + 9871.

It is an arithmetic number, because the mean of its divisors is an integer number (1323360).

Almost surely, 2^12534478 is an apocalyptic number.

12534478 is a deficient number, since it is larger than the sum of its proper divisors (8639282).

12534478 is a wasteful number, since it uses less digits than its factorization.

12534478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18423.

The product of its digits is 26880, while the sum is 34.

The square root of 12534478 is about 3540.4064738388. The cubic root of 12534478 is about 232.2926227322.

Adding to 12534478 its reverse (87443521), we get a palindrome (99977999).

The spelling of 12534478 in words is "twelve million, five hundred thirty-four thousand, four hundred seventy-eight".