442540501 has 4 divisors (see below), whose sum is σ = 476582092. Its totient is φ = 408498912.

The previous prime is 442540499. The next prime is 442540507. The reversal of 442540501 is 105045244.

It is a happy number.

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 192932100 + 249608401 = 13890^2 + 15799^2 .

It is a cyclic number.

It is not a de Polignac number, because 442540501 - 2¹ = 442540499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442540507) by changing a digit.

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, 17020776 + ... + 17020801.

It is an arithmetic number, because the mean of its divisors is an integer number (119145523).

Almost surely, 2^442540501 is an apocalyptic number.

It is an amenable number.

442540501 is a deficient number, since it is larger than the sum of its proper divisors (34041591).

442540501 is a wasteful number, since it uses less digits than its factorization.

442540501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34041590.

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

The square root of 442540501 is about 21036.6466196492. The cubic root of 442540501 is about 762.0515329697.

Adding to 442540501 its reverse (105045244), we get a palindrome (547585745).

The spelling of 442540501 in words is "four hundred forty-two million, five hundred forty thousand, five hundred one".