42472160921 has 4 divisors (see below), whose sum is σ = 42473836644. Its totient is φ = 42470485200.

The previous prime is 42472160909. The next prime is 42472160933. The reversal of 42472160921 is 12906127424.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (42472160909) and next prime (42472160933).

It can be written as a sum of positive squares in 2 ways, for example, as 22249898896 + 20222262025 = 149164^2 + 142205^2 .

It is a cyclic number.

It is not a de Polignac number, because 42472160921 - 2³⁴ = 25292291737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42472160981) 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, 799250 + ... + 850731.

It is an arithmetic number, because the mean of its divisors is an integer number (10618459161).

Almost surely, 2^42472160921 is an apocalyptic number.

It is an amenable number.

42472160921 is a deficient number, since it is larger than the sum of its proper divisors (1675723).

42472160921 is a wasteful number, since it uses less digits than its factorization.

42472160921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675722.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 42472160921 in words is "forty-two billion, four hundred seventy-two million, one hundred sixty thousand, nine hundred twenty-one".