9981057 has 32 divisors (see below), whose sum is σ = 15040512. Its totient is φ = 5854464.

The previous prime is 9981053. The next prime is 9981073. The reversal of 9981057 is 7501899.

It is a happy number.

It is not a de Polignac number, because 9981057 - 2² = 9981053 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

9981057 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9981053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78528 + ... + 78654.

It is an arithmetic number, because the mean of its divisors is an integer number (470016).

Almost surely, 2^9981057 is an apocalyptic number.

It is an amenable number.

9981057 is a deficient number, since it is larger than the sum of its proper divisors (5059455).

9981057 is a wasteful number, since it uses less digits than its factorization.

9981057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 9981057 is about 3159.2810891087. The cubic root of 9981057 is about 215.3073448259.

The spelling of 9981057 in words is "nine million, nine hundred eighty-one thousand, fifty-seven".