12101540 has 48 divisors (see below), whose sum is σ = 28171584. Its totient is φ = 4329600.

The previous prime is 12101527. The next prime is 12101567. The reversal of 12101540 is 4510121.

12101540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14330 + ... + 15150.

It is an arithmetic number, because the mean of its divisors is an integer number (586908).

Almost surely, 2^12101540 is an apocalyptic number.

12101540 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 12101540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14085792).

12101540 is an abundant number, since it is smaller than the sum of its proper divisors (16070044).

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

12101540 is a wasteful number, since it uses less digits than its factorization.

12101540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908 (or 906 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 12101540 is about 3478.7267785786. The cubic root of 12101540 is about 229.5867816855.

Adding to 12101540 its reverse (4510121), we get a palindrome (16611661).

The spelling of 12101540 in words is "twelve million, one hundred one thousand, five hundred forty".