12161757 has 4 divisors (see below), whose sum is σ = 16215680. Its totient is φ = 8107836.

The previous prime is 12161719. The next prime is 12161771. The reversal of 12161757 is 75716121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12161757 - 2⁷ = 12161629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161717) 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, 2026957 + ... + 2026962.

It is an arithmetic number, because the mean of its divisors is an integer number (4053920).

Almost surely, 2^12161757 is an apocalyptic number.

It is an amenable number.

12161757 is a deficient number, since it is larger than the sum of its proper divisors (4053923).

12161757 is an equidigital number, since it uses as much as digits as its factorization.

12161757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4053922.

The product of its digits is 2940, while the sum is 30.

The square root of 12161757 is about 3487.3710728857. The cubic root of 12161757 is about 229.9669580763.

Adding to 12161757 its reverse (75716121), we get a palindrome (87877878).

The spelling of 12161757 in words is "twelve million, one hundred sixty-one thousand, seven hundred fifty-seven".