12161545 has 16 divisors (see below), whose sum is σ = 16858368. Its totient is φ = 8323840.

The previous prime is 12161533. The next prime is 12161563. The reversal of 12161545 is 54516121.

It is a happy number.

It is not a de Polignac number, because 12161545 - 2⁷ = 12161417 is a prime.

It is a Duffinian number.

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, 5569 + ... + 7438.

It is an arithmetic number, because the mean of its divisors is an integer number (1053648).

Almost surely, 2^12161545 is an apocalyptic number.

It is an amenable number.

12161545 is a deficient number, since it is larger than the sum of its proper divisors (4696823).

12161545 is a wasteful number, since it uses less digits than its factorization.

12161545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13040.

The product of its digits is 1200, while the sum is 25.

The square root of 12161545 is about 3487.3406773643. The cubic root of 12161545 is about 229.9656218309.

Adding to 12161545 its reverse (54516121), we get a palindrome (66677666).

The spelling of 12161545 in words is "twelve million, one hundred sixty-one thousand, five hundred forty-five".