40620145 has 4 divisors (see below), whose sum is σ = 48744180. Its totient is φ = 32496112.

The previous prime is 40620133. The next prime is 40620169. The reversal of 40620145 is 54102604.

40620145 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 5193841 + 35426304 = 2279^2 + 5952^2 .

It is a cyclic number.

It is not a de Polignac number, because 40620145 - 2¹⁹ = 40095857 is a prime.

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, 4062010 + ... + 4062019.

It is an arithmetic number, because the mean of its divisors is an integer number (12186045).

Almost surely, 2^40620145 is an apocalyptic number.

It is an amenable number.

40620145 is a deficient number, since it is larger than the sum of its proper divisors (8124035).

40620145 is an equidigital number, since it uses as much as digits as its factorization.

40620145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8124034.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 40620145 is about 6373.3935230770. The cubic root of 40620145 is about 343.7535219474.

Adding to 40620145 its reverse (54102604), we get a palindrome (94722749).

The spelling of 40620145 in words is "forty million, six hundred twenty thousand, one hundred forty-five".