40445245 has 4 divisors (see below), whose sum is σ = 48534300. Its totient is φ = 32356192.

The previous prime is 40445233. The next prime is 40445269. The reversal of 40445245 is 54254404.

40445245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31427236 + 9018009 = 5606^2 + 3003^2 .

It is a cyclic number.

It is not a de Polignac number, because 40445245 - 2⁷ = 40445117 is a prime.

It is a super-2 number, since 2×40445245² = 3271635686220050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4044520 + ... + 4044529.

It is an arithmetic number, because the mean of its divisors is an integer number (12133575).

Almost surely, 2^40445245 is an apocalyptic number.

It is an amenable number.

40445245 is a deficient number, since it is larger than the sum of its proper divisors (8089055).

40445245 is an equidigital number, since it uses as much as digits as its factorization.

40445245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8089054.

The product of its (nonzero) digits is 12800, while the sum is 28.

The square root of 40445245 is about 6359.6576165703. The cubic root of 40445245 is about 343.2594404294.

Adding to 40445245 its reverse (54254404), we get a palindrome (94699649).

The spelling of 40445245 in words is "forty million, four hundred forty-five thousand, two hundred forty-five".