42239501 has 4 divisors (see below), whose sum is σ = 42275100. Its totient is φ = 42203904.

The previous prime is 42239497. The next prime is 42239503. The reversal of 42239501 is 10593224.

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 41615401 + 624100 = 6451^2 + 790^2 .

It is a cyclic number.

It is not a de Polignac number, because 42239501 - 2² = 42239497 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 (42239503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15956 + ... + 18413.

It is an arithmetic number, because the mean of its divisors is an integer number (10568775).

Almost surely, 2^42239501 is an apocalyptic number.

It is an amenable number.

42239501 is a deficient number, since it is larger than the sum of its proper divisors (35599).

42239501 is a wasteful number, since it uses less digits than its factorization.

42239501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35598.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 42239501 is about 6499.1923344366. The cubic root of 42239501 is about 348.2621362441.

The spelling of 42239501 in words is "forty-two million, two hundred thirty-nine thousand, five hundred one".