40021875 has 36 divisors (see below), whose sum is σ = 72307872. Its totient is φ = 21330000.

The previous prime is 40021867. The next prime is 40021903. The reversal of 40021875 is 57812004.

It is not a de Polignac number, because 40021875 - 2³ = 40021867 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 27414 + ... + 28836.

It is an arithmetic number, because the mean of its divisors is an integer number (2008552).

Almost surely, 2^40021875 is an apocalyptic number.

40021875 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40021875 is a deficient number, since it is larger than the sum of its proper divisors (32285997).

40021875 is an equidigital number, since it uses as much as digits as its factorization.

40021875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454 (or 1431 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 40021875 is about 6326.2844545594. The cubic root of 40021875 is about 342.0575208473.

Adding to 40021875 its reverse (57812004), we get a palindrome (97833879).

The spelling of 40021875 in words is "forty million, twenty-one thousand, eight hundred seventy-five".