9521442142 has 4 divisors (see below), whose sum is σ = 14282163216. Its totient is φ = 4760721070.

The previous prime is 9521442113. The next prime is 9521442143. The reversal of 9521442142 is 2412441259.

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

It is a junction number, because it is equal to n+sod(n) for n = 9521442098 and 9521442107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9521442143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2380360534 + ... + 2380360537.

It is an arithmetic number, because the mean of its divisors is an integer number (3570540804).

Almost surely, 2^9521442142 is an apocalyptic number.

9521442142 is a deficient number, since it is larger than the sum of its proper divisors (4760721074).

9521442142 is a wasteful number, since it uses less digits than its factorization.

9521442142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4760721073.

The product of its digits is 23040, while the sum is 34.

The square root of 9521442142 is about 97577.8773185808. The cubic root of 9521442142 is about 2119.5040181541.

The spelling of 9521442142 in words is "nine billion, five hundred twenty-one million, four hundred forty-two thousand, one hundred forty-two".