9971542 has 24 divisors (see below), whose sum is σ = 18050256. Its totient is φ = 4046544.

The previous prime is 9971539. The next prime is 9971551. The reversal of 9971542 is 2451799.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4068 + ... + 6040.

It is an arithmetic number, because the mean of its divisors is an integer number (752094).

Almost surely, 2^9971542 is an apocalyptic number.

9971542 is a deficient number, since it is larger than the sum of its proper divisors (8078714).

9971542 is a wasteful number, since it uses less digits than its factorization.

9971542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020 (or 2001 counting only the distinct ones).

The product of its digits is 22680, while the sum is 37.

The square root of 9971542 is about 3157.7748494787. The cubic root of 9971542 is about 215.2389051563.

The spelling of 9971542 in words is "nine million, nine hundred seventy-one thousand, five hundred forty-two".