9971481 has 8 divisors (see below), whose sum is σ = 14318080. Its totient is φ = 6136272.

The previous prime is 9971461. The next prime is 9971483. The reversal of 9971481 is 1841799.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9971481 - 2⁶ = 9971417 is a prime.

It is a super-2 number, since 2×9971481² = 198860866666722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 255679 = 9971481 / (9 + 9 + 7 + 1 + 4 + 8 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9971483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127801 + ... + 127878.

It is an arithmetic number, because the mean of its divisors is an integer number (1789760).

Almost surely, 2^9971481 is an apocalyptic number.

It is an amenable number.

9971481 is a deficient number, since it is larger than the sum of its proper divisors (4346599).

9971481 is a wasteful number, since it uses less digits than its factorization.

9971481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255695.

The product of its digits is 18144, while the sum is 39.

The square root of 9971481 is about 3157.7651907639. The cubic root of 9971481 is about 215.2384662540.

The spelling of 9971481 in words is "nine million, nine hundred seventy-one thousand, four hundred eighty-one".