12400534 has 8 divisors (see below), whose sum is σ = 18747648. Its totient is φ = 6151320.

The previous prime is 12400517. The next prime is 12400541. The reversal of 12400534 is 43500421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24157 + ... + 24664.

It is an arithmetic number, because the mean of its divisors is an integer number (2343456).

Almost surely, 2^12400534 is an apocalyptic number.

12400534 is a deficient number, since it is larger than the sum of its proper divisors (6347114).

12400534 is a wasteful number, since it uses less digits than its factorization.

12400534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48950.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 12400534 is about 3521.4391944204. The cubic root of 12400534 is about 231.4622279601.

Adding to 12400534 its reverse (43500421), we get a palindrome (55900955).

The spelling of 12400534 in words is "twelve million, four hundred thousand, five hundred thirty-four".