42021405004015 has 8 divisors (see below), whose sum is σ = 50425760922048. Its totient is φ = 33617074058400.

The previous prime is 42021405004013. The next prime is 42021405004021. The reversal of 42021405004015 is 51040050412024.

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

It is not a de Polignac number, because 42021405004015 - 2¹ = 42021405004013 is a prime.

It is a super-2 number, since 2×42021405004015² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42021405004013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2316636 + ... + 9455665.

It is an arithmetic number, because the mean of its divisors is an integer number (6303220115256).

Almost surely, 2^{42021405004015} is an apocalyptic number.

42021405004015 is a deficient number, since it is larger than the sum of its proper divisors (8404355918033).

42021405004015 is a wasteful number, since it uses less digits than its factorization.

42021405004015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12486209.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 42021405004015 its reverse (51040050412024), we get a palindrome (93061455416039).

The spelling of 42021405004015 in words is "forty-two trillion, twenty-one billion, four hundred five million, four thousand, fifteen".