40040545 has 4 divisors (see below), whose sum is σ = 48048660. Its totient is φ = 32032432.

The previous prime is 40040537. The next prime is 40040551. The reversal of 40040545 is 54504004.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26666896 + 13373649 = 5164^2 + 3657^2 .

It is a cyclic number.

It is not a de Polignac number, because 40040545 - 2³ = 40040537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4004050 + ... + 4004059.

It is an arithmetic number, because the mean of its divisors is an integer number (12012165).

Almost surely, 2^40040545 is an apocalyptic number.

It is an amenable number.

40040545 is a deficient number, since it is larger than the sum of its proper divisors (8008115).

40040545 is an equidigital number, since it uses as much as digits as its factorization.

40040545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8008114.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 40040545 is about 6327.7598721823. The cubic root of 40040545 is about 342.1107019399.

Adding to 40040545 its reverse (54504004), we get a palindrome (94544549).

The spelling of 40040545 in words is "forty million, forty thousand, five hundred forty-five".