42590501 has 4 divisors (see below), whose sum is σ = 42749100. Its totient is φ = 42431904.

The previous prime is 42590479. The next prime is 42590543. The reversal of 42590501 is 10509524.

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 21669025 + 20921476 = 4655^2 + 4574^2 .

It is a cyclic number.

It is not a de Polignac number, because 42590501 - 2⁶ = 42590437 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 (42590591) 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, 78896 + ... + 79433.

It is an arithmetic number, because the mean of its divisors is an integer number (10687275).

Almost surely, 2^42590501 is an apocalyptic number.

It is an amenable number.

42590501 is a deficient number, since it is larger than the sum of its proper divisors (158599).

42590501 is a wasteful number, since it uses less digits than its factorization.

42590501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158598.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 42590501 is about 6526.1398238162. The cubic root of 42590501 is about 349.2241344253.

The spelling of 42590501 in words is "forty-two million, five hundred ninety thousand, five hundred one".