12115545 has 16 divisors (see below), whose sum is σ = 20876352. Its totient is φ = 5964480.

The previous prime is 12115531. The next prime is 12115547. The reversal of 12115545 is 54551121.

It is not a de Polignac number, because 12115545 - 2¹³ = 12107353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12115547) 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, 30871 + ... + 31260.

It is an arithmetic number, because the mean of its divisors is an integer number (1304772).

Almost surely, 2^12115545 is an apocalyptic number.

12115545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12115545 is a deficient number, since it is larger than the sum of its proper divisors (8760807).

12115545 is a wasteful number, since it uses less digits than its factorization.

12115545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62152.

The product of its digits is 1000, while the sum is 24.

The square root of 12115545 is about 3480.7391456413. The cubic root of 12115545 is about 229.6753137595.

Adding to 12115545 its reverse (54551121), we get a palindrome (66666666).

The spelling of 12115545 in words is "twelve million, one hundred fifteen thousand, five hundred forty-five".