9942751 has 16 divisors (see below), whose sum is σ = 12572224. Its totient is φ = 7651584.

The previous prime is 9942749. The next prime is 9942763. The reversal of 9942751 is 1572499.

It is a cyclic number.

It is not a de Polignac number, because 9942751 - 2¹ = 9942749 is a prime.

It is a super-5 number, since 5×9942751⁵ (a number of 36 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 9942751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9942701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1891 + ... + 4843.

It is an arithmetic number, because the mean of its divisors is an integer number (785764).

Almost surely, 2^9942751 is an apocalyptic number.

9942751 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

9942751 is a deficient number, since it is larger than the sum of its proper divisors (2629473).

9942751 is a wasteful number, since it uses less digits than its factorization.

9942751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3010.

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

The square root of 9942751 is about 3153.2128060123. The cubic root of 9942751 is about 215.0315511656.

The spelling of 9942751 in words is "nine million, nine hundred forty-two thousand, seven hundred fifty-one".