40422021 has 32 divisors (see below), whose sum is σ = 57784320. Its totient is φ = 25100544.

The previous prime is 40422013. The next prime is 40422029. The reversal of 40422021 is 12022404.

It is an interprime number because it is at equal distance from previous prime (40422013) and next prime (40422029).

It is not a de Polignac number, because 40422021 - 2³ = 40422013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40422029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 357661 + ... + 357773.

It is an arithmetic number, because the mean of its divisors is an integer number (1805760).

Almost surely, 2^40422021 is an apocalyptic number.

It is an amenable number.

40422021 is a deficient number, since it is larger than the sum of its proper divisors (17362299).

40422021 is a wasteful number, since it uses less digits than its factorization.

40422021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 40422021 is about 6357.8314699275. The cubic root of 40422021 is about 343.1937270304.

Adding to 40422021 its reverse (12022404), we get a palindrome (52444425).

The spelling of 40422021 in words is "forty million, four hundred twenty-two thousand, twenty-one".