42021261005 has 16 divisors (see below), whose sum is σ = 51674326704. Its totient is φ = 32785067520.

The previous prime is 42021260959. The next prime is 42021261031. The reversal of 42021261005 is 50016212024.

It is a happy number.

42021261005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 17865262921 + 24155998084 = 133661^2 + 155422^2 .

It is not a de Polignac number, because 42021261005 - 2³⁴ = 24841391821 is a prime.

It is a super-2 number, since 2×42021261005² (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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545459 + ... + 617711.

It is an arithmetic number, because the mean of its divisors is an integer number (3229645419).

Almost surely, 2^42021261005 is an apocalyptic number.

It is an amenable number.

42021261005 is a deficient number, since it is larger than the sum of its proper divisors (9653065699).

42021261005 is a wasteful number, since it uses less digits than its factorization.

42021261005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75136.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 42021261005 its reverse (50016212024), we get a palindrome (92037473029).

The spelling of 42021261005 in words is "forty-two billion, twenty-one million, two hundred sixty-one thousand, five".