40507043 has 4 divisors (see below), whose sum is σ = 41062008. Its totient is φ = 39952080.

The previous prime is 40507021. The next prime is 40507067. The reversal of 40507043 is 34070504.

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

It is a cyclic number.

It is not a de Polignac number, because 40507043 - 2²⁰ = 39458467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40507003) 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, 277373 + ... + 277518.

It is an arithmetic number, because the mean of its divisors is an integer number (10265502).

Almost surely, 2^40507043 is an apocalyptic number.

40507043 is a deficient number, since it is larger than the sum of its proper divisors (554965).

40507043 is an equidigital number, since it uses as much as digits as its factorization.

40507043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554964.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 40507043 is about 6364.5143569639. The cubic root of 40507043 is about 343.4341783342.

Adding to 40507043 its reverse (34070504), we get a palindrome (74577547).

The spelling of 40507043 in words is "forty million, five hundred seven thousand, forty-three".