40020545 has 8 divisors (see below), whose sum is σ = 48094080. Its totient is φ = 31970160.

The previous prime is 40020527. The next prime is 40020599. The reversal of 40020545 is 54502004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40020545 - 2⁶ = 40020481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1721 + ... + 9110.

It is an arithmetic number, because the mean of its divisors is an integer number (6011760).

Almost surely, 2^40020545 is an apocalyptic number.

It is an amenable number.

40020545 is a deficient number, since it is larger than the sum of its proper divisors (8073535).

40020545 is a wasteful number, since it uses less digits than its factorization.

40020545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11575.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 40020545 is about 6326.1793366929. The cubic root of 40020545 is about 342.0537317399.

Adding to 40020545 its reverse (54502004), we get a palindrome (94522549).

The spelling of 40020545 in words is "forty million, twenty thousand, five hundred forty-five".