12546440 has 16 divisors (see below), whose sum is σ = 28229580. Its totient is φ = 5018560.

The previous prime is 12546433. The next prime is 12546461. The reversal of 12546440 is 4464521.

It can be written as a sum of positive squares in 2 ways, for example, as 12545764 + 676 = 3542^2 + 26^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156791 + ... + 156870.

Almost surely, 2^12546440 is an apocalyptic number.

12546440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12546440 is an abundant number, since it is smaller than the sum of its proper divisors (15683140).

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

12546440 is a wasteful number, since it uses less digits than its factorization.

12546440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313672 (or 313668 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 12546440 is about 3542.0954250274. The cubic root of 12546440 is about 232.3664936690.

The spelling of 12546440 in words is "twelve million, five hundred forty-six thousand, four hundred forty".