12400533 has 12 divisors (see below), whose sum is σ = 18575648. Its totient is φ = 8266860.

The previous prime is 12400517. The next prime is 12400541. The reversal of 12400533 is 33500421.

It is not a de Polignac number, because 12400533 - 2⁴ = 12400517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25273 + ... + 25758.

Almost surely, 2^12400533 is an apocalyptic number.

It is an amenable number.

12400533 is a deficient number, since it is larger than the sum of its proper divisors (6175115).

12400533 is an frugal number, since it uses more digits than its factorization.

12400533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51046 (or 51034 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 12400533 is about 3521.4390524330. The cubic root of 12400533 is about 231.4622217383.

Adding to 12400533 its reverse (33500421), we get a palindrome (45900954).

The spelling of 12400533 in words is "twelve million, four hundred thousand, five hundred thirty-three".