40571641 has 4 divisors (see below), whose sum is σ = 44259984. Its totient is φ = 36883300.

The previous prime is 40571621. The next prime is 40571677. The reversal of 40571641 is 14617504.

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 40571641 - 2⁷ = 40571513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40571611) 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, 1844155 + ... + 1844176.

It is an arithmetic number, because the mean of its divisors is an integer number (11064996).

Almost surely, 2^40571641 is an apocalyptic number.

It is an amenable number.

40571641 is a deficient number, since it is larger than the sum of its proper divisors (3688343).

40571641 is a wasteful number, since it uses less digits than its factorization.

40571641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3688342.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 40571641 is about 6369.5871922755. The cubic root of 40571641 is about 343.6166435443.

The spelling of 40571641 in words is "forty million, five hundred seventy-one thousand, six hundred forty-one".