43121161 has 8 divisors (see below), whose sum is σ = 43725024. Its totient is φ = 42521760.

The previous prime is 43121101. The next prime is 43121189. The reversal of 43121161 is 16112134.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43121161 - 2⁷ = 43121033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43121101) 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, 21366 + ... + 23296.

It is an arithmetic number, because the mean of its divisors is an integer number (5465628).

Almost surely, 2^43121161 is an apocalyptic number.

It is an amenable number.

43121161 is a deficient number, since it is larger than the sum of its proper divisors (603863).

43121161 is a wasteful number, since it uses less digits than its factorization.

43121161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231.

The product of its digits is 144, while the sum is 19.

The square root of 43121161 is about 6566.6704653119. The cubic root of 43121161 is about 350.6685480188.

Adding to 43121161 its reverse (16112134), we get a palindrome (59233295).

The spelling of 43121161 in words is "forty-three million, one hundred twenty-one thousand, one hundred sixty-one".