12501405 has 32 divisors (see below), whose sum is σ = 25401600. Its totient is φ = 5714496.

The previous prime is 12501371. The next prime is 12501413. The reversal of 12501405 is 50410521.

It is not a de Polignac number, because 12501405 - 2⁹ = 12500893 is a prime.

It is a super-3 number, since 3×12501405³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5670 + ... + 7559.

It is an arithmetic number, because the mean of its divisors is an integer number (793800).

Almost surely, 2^12501405 is an apocalyptic number.

12501405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12501405 is an abundant number, since it is smaller than the sum of its proper divisors (12900195).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12501405 is a wasteful number, since it uses less digits than its factorization.

12501405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13250 (or 13244 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 12501405 is about 3535.7325973552. The cubic root of 12501405 is about 232.0881365980.

Adding to 12501405 its reverse (50410521), we get a palindrome (62911926).

The spelling of 12501405 in words is "twelve million, five hundred one thousand, four hundred five".