12530405 has 8 divisors (see below), whose sum is σ = 15828000. Its totient is φ = 9496656.

The previous prime is 12530393. The next prime is 12530429. The reversal of 12530405 is 50403521.

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

It is not a de Polignac number, because 12530405 - 2⁸ = 12530149 is a prime.

It is a super-2 number, since 2×12530405² = 314022098928050, 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, 65855 + ... + 66044.

It is an arithmetic number, because the mean of its divisors is an integer number (1978500).

Almost surely, 2^12530405 is an apocalyptic number.

It is an amenable number.

12530405 is a deficient number, since it is larger than the sum of its proper divisors (3297595).

12530405 is a wasteful number, since it uses less digits than its factorization.

12530405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131923.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 12530405 is about 3539.8312106653. The cubic root of 12530405 is about 232.2674593295.

Adding to 12530405 its reverse (50403521), we get a palindrome (62933926).

The spelling of 12530405 in words is "twelve million, five hundred thirty thousand, four hundred five".