40574921 has 4 divisors (see below), whose sum is σ = 42339072. Its totient is φ = 38810772.

The previous prime is 40574887. The next prime is 40574987. The reversal of 40574921 is 12947504.

It is a happy number.

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 40574921 - 2¹⁸ = 40312777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40574021) 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, 882041 + ... + 882086.

It is an arithmetic number, because the mean of its divisors is an integer number (10584768).

Almost surely, 2^40574921 is an apocalyptic number.

It is an amenable number.

40574921 is a deficient number, since it is larger than the sum of its proper divisors (1764151).

40574921 is a wasteful number, since it uses less digits than its factorization.

40574921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764150.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 40574921 is about 6369.8446605863. The cubic root of 40574921 is about 343.6259031502.

The spelling of 40574921 in words is "forty million, five hundred seventy-four thousand, nine hundred twenty-one".