12153523 has 4 divisors (see below), whose sum is σ = 12572640. Its totient is φ = 11734408.

The previous prime is 12153517. The next prime is 12153541. The reversal of 12153523 is 32535121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32535121 = 3947 ⋅8243.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12153523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12153494 and 12153503.

It is not an unprimeable number, because it can be changed into a prime (12153503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209515 + ... + 209572.

It is an arithmetic number, because the mean of its divisors is an integer number (3143160).

Almost surely, 2^12153523 is an apocalyptic number.

12153523 is a deficient number, since it is larger than the sum of its proper divisors (419117).

12153523 is an equidigital number, since it uses as much as digits as its factorization.

12153523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419116.

The product of its digits is 900, while the sum is 22.

The square root of 12153523 is about 3486.1903275639. The cubic root of 12153523 is about 229.9150473908.

Adding to 12153523 its reverse (32535121), we get a palindrome (44688644).

The spelling of 12153523 in words is "twelve million, one hundred fifty-three thousand, five hundred twenty-three".