40434161 has 4 divisors (see below), whose sum is σ = 42192192. Its totient is φ = 38676132.

The previous prime is 40434157. The next prime is 40434169. The reversal of 40434161 is 16143404.

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 40434161 - 2² = 40434157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 1758007 = 40434161 / (4 + 0 + 4 + 3 + 4 + 1 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40434169) 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, 878981 + ... + 879026.

It is an arithmetic number, because the mean of its divisors is an integer number (10548048).

Almost surely, 2^40434161 is an apocalyptic number.

It is an amenable number.

40434161 is a deficient number, since it is larger than the sum of its proper divisors (1758031).

40434161 is a wasteful number, since it uses less digits than its factorization.

40434161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758030.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 40434161 is about 6358.7861262980. The cubic root of 40434161 is about 343.2280808695.

Adding to 40434161 its reverse (16143404), we get a palindrome (56577565).

The spelling of 40434161 in words is "forty million, four hundred thirty-four thousand, one hundred sixty-one".