42052121452 has 24 divisors (see below), whose sum is σ = 80414952912. Its totient is φ = 19082784000.

The previous prime is 42052121429. The next prime is 42052121453. The reversal of 42052121452 is 25412125024.

It is a happy number.

It is a super-2 number, since 2×42052121452² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42052121452.

It is not an unprimeable number, because it can be changed into a prime (42052121453) 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, 768673 + ... + 821560.

It is an arithmetic number, because the mean of its divisors is an integer number (3350623038).

Almost surely, 2^42052121452 is an apocalyptic number.

It is an amenable number.

42052121452 is a deficient number, since it is larger than the sum of its proper divisors (38362831460).

42052121452 is a wasteful number, since it uses less digits than its factorization.

42052121452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590849 (or 1590847 counting only the distinct ones).

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

Adding to 42052121452 its reverse (25412125024), we get a palindrome (67464246476).

The spelling of 42052121452 in words is "forty-two billion, fifty-two million, one hundred twenty-one thousand, four hundred fifty-two".