40874821 has 4 divisors (see below), whose sum is σ = 44019052. Its totient is φ = 37730592.

The previous prime is 40874809. The next prime is 40874831. The reversal of 40874821 is 12847804.

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 14976900 + 25897921 = 3870^2 + 5089^2 .

It is a cyclic number.

It is not a de Polignac number, because 40874821 - 2⁵ = 40874789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40874831) 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, 1572096 + ... + 1572121.

It is an arithmetic number, because the mean of its divisors is an integer number (11004763).

Almost surely, 2^40874821 is an apocalyptic number.

It is an amenable number.

40874821 is a deficient number, since it is larger than the sum of its proper divisors (3144231).

40874821 is a wasteful number, since it uses less digits than its factorization.

40874821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3144230.

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 40874821 is about 6393.3419273491. The cubic root of 40874821 is about 344.4704358889.

The spelling of 40874821 in words is "forty million, eight hundred seventy-four thousand, eight hundred twenty-one".