12153720 has 32 divisors (see below), whose sum is σ = 36461520. Its totient is φ = 3240960.

The previous prime is 12153719. The next prime is 12153721. The reversal of 12153720 is 2735121.

It is an interprime number because it is at equal distance from previous prime (12153719) and next prime (12153721).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12153721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50521 + ... + 50760.

Almost surely, 2^12153720 is an apocalyptic number.

12153720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12153720 is an abundant number, since it is smaller than the sum of its proper divisors (24307800).

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

12153720 is a wasteful number, since it uses less digits than its factorization.

12153720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101295 (or 101291 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 12153720 is about 3486.2185817874. The cubic root of 12153720 is about 229.9162896375.

Adding to 12153720 its reverse (2735121), we get a palindrome (14888841).

The spelling of 12153720 in words is "twelve million, one hundred fifty-three thousand, seven hundred twenty".