42401537 has 4 divisors (see below), whose sum is σ = 43201620. Its totient is φ = 41601456.

The previous prime is 42401531. The next prime is 42401549. The reversal of 42401537 is 73510424.

42401537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 20349121 + 22052416 = 4511^2 + 4696^2 .

It is a cyclic number.

It is not a de Polignac number, because 42401537 - 2¹⁰ = 42400513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42401531) 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, 399962 + ... + 400067.

It is an arithmetic number, because the mean of its divisors is an integer number (10800405).

Almost surely, 2^42401537 is an apocalyptic number.

It is an amenable number.

42401537 is a deficient number, since it is larger than the sum of its proper divisors (800083).

42401537 is an equidigital number, since it uses as much as digits as its factorization.

42401537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800082.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 42401537 is about 6511.6462588197. The cubic root of 42401537 is about 348.7068936928.

The spelling of 42401537 in words is "forty-two million, four hundred one thousand, five hundred thirty-seven".