40421554 has 8 divisors (see below), whose sum is σ = 60858540. Its totient is φ = 20135376.

The previous prime is 40421543. The next prime is 40421561. The reversal of 40421554 is 45512404.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40030929 + 390625 = 6327^2 + 625^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 37029 + ... + 38104.

Almost surely, 2^40421554 is an apocalyptic number.

40421554 is a deficient number, since it is larger than the sum of its proper divisors (20436986).

40421554 is a wasteful number, since it uses less digits than its factorization.

40421554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75404.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 40421554 is about 6357.7947434625. The cubic root of 40421554 is about 343.1924053738.

Adding to 40421554 its reverse (45512404), we get a palindrome (85933958).

The spelling of 40421554 in words is "forty million, four hundred twenty-one thousand, five hundred fifty-four".