40421245 has 8 divisors (see below), whose sum is σ = 49421016. Its totient is φ = 31726656.

The previous prime is 40421239. The next prime is 40421263. The reversal of 40421245 is 54212404.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11573604 + 28847641 = 3402^2 + 5371^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 40421245 - 2²¹ = 38324093 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76002 + ... + 76531.

It is an arithmetic number, because the mean of its divisors is an integer number (6177627).

Almost surely, 2^40421245 is an apocalyptic number.

It is an amenable number.

40421245 is a deficient number, since it is larger than the sum of its proper divisors (8999771).

40421245 is a wasteful number, since it uses less digits than its factorization.

40421245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152591.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 40421245 is about 6357.7704425372. The cubic root of 40421245 is about 343.1915308674.

Adding to 40421245 its reverse (54212404), we get a palindrome (94633649).

The spelling of 40421245 in words is "forty million, four hundred twenty-one thousand, two hundred forty-five".