40421956 has 6 divisors (see below), whose sum is σ = 70738430. Its totient is φ = 20210976.

The previous prime is 40421947. The next prime is 40421957. The reversal of 40421956 is 65912404.

It can be written as a sum of positive squares in only one way, i.e., 29333056 + 11088900 = 5416^2 + 3330^2 .

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (40421957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5052741 + ... + 5052748.

Almost surely, 2^40421956 is an apocalyptic number.

It is an amenable number.

40421956 is a deficient number, since it is larger than the sum of its proper divisors (30316474).

40421956 is a wasteful number, since it uses less digits than its factorization.

40421956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10105493 (or 10105491 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 40421956 is about 6357.8263581196. The cubic root of 40421956 is about 343.1935430745.

The spelling of 40421956 in words is "forty million, four hundred twenty-one thousand, nine hundred fifty-six".