40567021 has 4 divisors (see below), whose sum is σ = 44254944. Its totient is φ = 36879100.

The previous prime is 40567019. The next prime is 40567061. The reversal of 40567021 is 12076504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40567021 - 2¹ = 40567019 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 (40567061) 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, 1843945 + ... + 1843966.

It is an arithmetic number, because the mean of its divisors is an integer number (11063736).

Almost surely, 2^40567021 is an apocalyptic number.

It is an amenable number.

40567021 is a deficient number, since it is larger than the sum of its proper divisors (3687923).

40567021 is a wasteful number, since it uses less digits than its factorization.

40567021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687922.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 40567021 is about 6369.2245210857. The cubic root of 40567021 is about 343.6036002041.

The spelling of 40567021 in words is "forty million, five hundred sixty-seven thousand, twenty-one".