12553405 has 4 divisors (see below), whose sum is σ = 15064092. Its totient is φ = 10042720.

The previous prime is 12553403. The next prime is 12553417. The reversal of 12553405 is 50435521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50435521 = 3793 ⋅13297.

It can be written as a sum of positive squares in 2 ways, for example, as 3048516 + 9504889 = 1746^2 + 3083^2 .

It is not a de Polignac number, because 12553405 - 2¹ = 12553403 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 12553405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12553403) 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, 1255336 + ... + 1255345.

It is an arithmetic number, because the mean of its divisors is an integer number (3766023).

Almost surely, 2^12553405 is an apocalyptic number.

It is an amenable number.

12553405 is a deficient number, since it is larger than the sum of its proper divisors (2510687).

12553405 is an equidigital number, since it uses as much as digits as its factorization.

12553405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510686.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 12553405 is about 3543.0784637092. The cubic root of 12553405 is about 232.4094841703.

Adding to 12553405 its reverse (50435521), we get a palindrome (62988926).

The spelling of 12553405 in words is "twelve million, five hundred fifty-three thousand, four hundred five".