40442153 has 4 divisors (see below), whose sum is σ = 41836740. Its totient is φ = 39047568.

The previous prime is 40442141. The next prime is 40442177. The reversal of 40442153 is 35124404.

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 19254544 + 21187609 = 4388^2 + 4603^2 .

It is a cyclic number.

It is not a de Polignac number, because 40442153 - 2⁸ = 40441897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40442123) by changing a digit.

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, 697250 + ... + 697307.

It is an arithmetic number, because the mean of its divisors is an integer number (10459185).

Almost surely, 2^40442153 is an apocalyptic number.

It is an amenable number.

40442153 is a deficient number, since it is larger than the sum of its proper divisors (1394587).

40442153 is a wasteful number, since it uses less digits than its factorization.

40442153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394586.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40442153 is about 6359.4145170762. The cubic root of 40442153 is about 343.2506929220.

Adding to 40442153 its reverse (35124404), we get a palindrome (75566557).

The spelling of 40442153 in words is "forty million, four hundred forty-two thousand, one hundred fifty-three".