12153540 has 96 divisors (see below), whose sum is σ = 40965120. Its totient is φ = 2630016.

The previous prime is 12153517. The next prime is 12153541. The reversal of 12153540 is 4535121.

12153540 is digitally balanced in base 2, base 4 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

12153540 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (12153541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7219 + ... + 8741.

It is an arithmetic number, because the mean of its divisors is an integer number (426720).

Almost surely, 2^12153540 is an apocalyptic number.

12153540 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 12153540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20482560).

12153540 is an abundant number, since it is smaller than the sum of its proper divisors (28811580).

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

12153540 is a wasteful number, since it uses less digits than its factorization.

12153540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561 (or 1559 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 12153540 is about 3486.1927657546. The cubic root of 12153540 is about 229.9151545903.

Adding to 12153540 its reverse (4535121), we get a palindrome (16688661).

The spelling of 12153540 in words is "twelve million, one hundred fifty-three thousand, five hundred forty".