40710021 has 16 divisors (see below), whose sum is σ = 59409408. Its totient is φ = 24591600.

The previous prime is 40710013. The next prime is 40710031. The reversal of 40710021 is 12001704.

It is not a de Polignac number, because 40710021 - 2³ = 40710013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40710031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9060 + ... + 12786.

It is an arithmetic number, because the mean of its divisors is an integer number (3713088).

Almost surely, 2^40710021 is an apocalyptic number.

It is an amenable number.

40710021 is a deficient number, since it is larger than the sum of its proper divisors (18699387).

40710021 is a wasteful number, since it uses less digits than its factorization.

40710021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4072.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 40710021 is about 6380.4405020343. The cubic root of 40710021 is about 344.0068644971.

Adding to 40710021 its reverse (12001704), we get a palindrome (52711725).

The spelling of 40710021 in words is "forty million, seven hundred ten thousand, twenty-one".