40345043 has 4 divisors (see below), whose sum is σ = 41646528. Its totient is φ = 39043560.

The previous prime is 40345021. The next prime is 40345057. The reversal of 40345043 is 34054304.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40345043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40345093) 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, 650696 + ... + 650757.

It is an arithmetic number, because the mean of its divisors is an integer number (10411632).

Almost surely, 2^40345043 is an apocalyptic number.

40345043 is a deficient number, since it is larger than the sum of its proper divisors (1301485).

40345043 is a wasteful number, since it uses less digits than its factorization.

40345043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301484.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 40345043 is about 6351.7747913477. The cubic root of 40345043 is about 342.9757340170.

Adding to 40345043 its reverse (34054304), we get a palindrome (74399347).

The spelling of 40345043 in words is "forty million, three hundred forty-five thousand, forty-three".