43401121 has 4 divisors (see below), whose sum is σ = 43628544. Its totient is φ = 43173700.

The previous prime is 43401109. The next prime is 43401131. The reversal of 43401121 is 12110434.

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 a cyclic number.

It is not a de Polignac number, because 43401121 - 2⁵ = 43401089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43401095 and 43401104.

It is not an unprimeable number, because it can be changed into a prime (43401101) 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, 113425 + ... + 113806.

It is an arithmetic number, because the mean of its divisors is an integer number (10907136).

Almost surely, 2^43401121 is an apocalyptic number.

It is an amenable number.

43401121 is a deficient number, since it is larger than the sum of its proper divisors (227423).

43401121 is a wasteful number, since it uses less digits than its factorization.

43401121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227422.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 43401121 is about 6587.9527168916. The cubic root of 43401121 is about 351.4258055346.

Adding to 43401121 its reverse (12110434), we get a palindrome (55511555).

The spelling of 43401121 in words is "forty-three million, four hundred one thousand, one hundred twenty-one".