12400453 has 4 divisors (see below), whose sum is σ = 13354348. Its totient is φ = 11446560.

The previous prime is 12400441. The next prime is 12400457. The reversal of 12400453 is 35400421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35400421 = 7 ⋅5057203.

It can be written as a sum of positive squares in 2 ways, for example, as 3508129 + 8892324 = 1873^2 + 2982^2 .

It is a cyclic number.

It is not a de Polignac number, because 12400453 - 2⁹ = 12399941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12400453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476928 + ... + 476953.

It is an arithmetic number, because the mean of its divisors is an integer number (3338587).

Almost surely, 2^12400453 is an apocalyptic number.

12400453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12400453 is a deficient number, since it is larger than the sum of its proper divisors (953895).

12400453 is an equidigital number, since it uses as much as digits as its factorization.

12400453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953894.

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

The square root of 12400453 is about 3521.4276934221. The cubic root of 12400453 is about 231.4617239904.

Adding to 12400453 its reverse (35400421), we get a palindrome (47800874).

The spelling of 12400453 in words is "twelve million, four hundred thousand, four hundred fifty-three".