40421955 has 32 divisors (see below), whose sum is σ = 75138048. Its totient is φ = 18172800.

The previous prime is 40421947. The next prime is 40421957. The reversal of 40421955 is 55912404.

It is not a de Polignac number, because 40421955 - 2³ = 40421947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40421957) 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, 3250 + ... + 9560.

It is an arithmetic number, because the mean of its divisors is an integer number (2348064).

Almost surely, 2^40421955 is an apocalyptic number.

40421955 is a deficient number, since it is larger than the sum of its proper divisors (34716093).

40421955 is a wasteful number, since it uses less digits than its factorization.

40421955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6387.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 40421955 is about 6357.8262794763. The cubic root of 40421955 is about 343.1935402444.

The spelling of 40421955 in words is "forty million, four hundred twenty-one thousand, nine hundred fifty-five".