12541540 has 48 divisors (see below), whose sum is σ = 29050560. Its totient is φ = 4510080.

The previous prime is 12541537. The next prime is 12541541. The reversal of 12541540 is 4514521.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (12541541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23719 + ... + 24241.

It is an arithmetic number, because the mean of its divisors is an integer number (605220).

Almost surely, 2^12541540 is an apocalyptic number.

12541540 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 12541540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14525280).

12541540 is an abundant number, since it is smaller than the sum of its proper divisors (16509020).

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

12541540 is a wasteful number, since it uses less digits than its factorization.

12541540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 12541540 is about 3541.4036765102. The cubic root of 12541540 is about 232.3362395603.

The spelling of 12541540 in words is "twelve million, five hundred forty-one thousand, five hundred forty".