42031501 has 4 divisors (see below), whose sum is σ = 42720604. Its totient is φ = 41342400.

The previous prime is 42031471. The next prime is 42031523. The reversal of 42031501 is 10513024.

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 18275625 + 23755876 = 4275^2 + 4874^2 .

It is a cyclic number.

It is not a de Polignac number, because 42031501 - 2¹³ = 42023309 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 (42031201) 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, 344460 + ... + 344581.

It is an arithmetic number, because the mean of its divisors is an integer number (10680151).

Almost surely, 2^42031501 is an apocalyptic number.

It is an amenable number.

42031501 is a deficient number, since it is larger than the sum of its proper divisors (689103).

42031501 is an equidigital number, since it uses as much as digits as its factorization.

42031501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689102.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 42031501 is about 6483.1705977862. The cubic root of 42031501 is about 347.6895461960.

Adding to 42031501 its reverse (10513024), we get a palindrome (52544525).

The spelling of 42031501 in words is "forty-two million, thirty-one thousand, five hundred one".