42145253441 has 4 divisors (see below), whose sum is σ = 42309243012. Its totient is φ = 41981263872.

The previous prime is 42145253417. The next prime is 42145253461. The reversal of 42145253441 is 14435254124.

It is a happy number.

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 22983772816 + 19161480625 = 151604^2 + 138425^2 .

It is a cyclic number.

It is not a de Polignac number, because 42145253441 - 2³⁰ = 41071511617 is a prime.

It is a super-2 number, since 2×42145253441² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42145253461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81994400 + ... + 81994913.

It is an arithmetic number, because the mean of its divisors is an integer number (10577310753).

Almost surely, 2^42145253441 is an apocalyptic number.

It is an amenable number.

42145253441 is a deficient number, since it is larger than the sum of its proper divisors (163989571).

42145253441 is a wasteful number, since it uses less digits than its factorization.

42145253441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163989570.

The product of its digits is 76800, while the sum is 35.

The spelling of 42145253441 in words is "forty-two billion, one hundred forty-five million, two hundred fifty-three thousand, four hundred forty-one".