12654540 has 72 divisors (see below), whose sum is σ = 38678640. Its totient is φ = 3348864.

The previous prime is 12654539. The next prime is 12654557. The reversal of 12654540 is 4545621.

12654540 is a `hidden beast` number, since 1 + 2 + 654 + 5 + 4 + 0 = 666.

It is a super-2 number, since 2×12654540² = 320274765223200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41067 + ... + 41373.

Almost surely, 2^12654540 is an apocalyptic number.

12654540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12654540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19339320).

12654540 is an abundant number, since it is smaller than the sum of its proper divisors (26024100).

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

12654540 is a wasteful number, since it uses less digits than its factorization.

12654540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 12654540 is about 3557.3220264688. The cubic root of 12654540 is about 233.0319419329.

The spelling of 12654540 in words is "twelve million, six hundred fifty-four thousand, five hundred forty".