9969142 has 4 divisors (see below), whose sum is σ = 14953716. Its totient is φ = 4984570.

The previous prime is 9969137. The next prime is 9969151. The reversal of 9969142 is 2419699.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2419699 = 83 ⋅29153.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 9969095 and 9969104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2492284 + ... + 2492287.

It is an arithmetic number, because the mean of its divisors is an integer number (3738429).

Almost surely, 2^9969142 is an apocalyptic number.

9969142 is a deficient number, since it is larger than the sum of its proper divisors (4984574).

9969142 is a wasteful number, since it uses less digits than its factorization.

9969142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4984573.

The product of its digits is 34992, while the sum is 40.

The square root of 9969142 is about 3157.3948121830. The cubic root of 9969142 is about 215.2216355163.

It can be divided in two parts, 9 and 969142, that multiplied together give a palindrome (8722278).

The spelling of 9969142 in words is "nine million, nine hundred sixty-nine thousand, one hundred forty-two".