42521302765 has 8 divisors (see below), whose sum is σ = 51143954688. Its totient is φ = 33938114640.

The previous prime is 42521302741. The next prime is 42521302823. The reversal of 42521302765 is 56720312524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42521302765 - 2³¹ = 40373819117 is a prime.

It is a super-2 number, since 2×42521302765² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9863577 + ... + 9867886.

It is an arithmetic number, because the mean of its divisors is an integer number (6392994336).

Almost surely, 2^42521302765 is an apocalyptic number.

It is an amenable number.

42521302765 is a deficient number, since it is larger than the sum of its proper divisors (8622651923).

42521302765 is a wasteful number, since it uses less digits than its factorization.

42521302765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19731899.

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 42521302765 in words is "forty-two billion, five hundred twenty-one million, three hundred two thousand, seven hundred sixty-five".