9642749 has 8 divisors (see below), whose sum is σ = 9918720. Its totient is φ = 9368800.

The previous prime is 9642719. The next prime is 9642751. The reversal of 9642749 is 9472469.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9642749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9642719) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 19394 + ... + 19884.

It is an arithmetic number, because the mean of its divisors is an integer number (1239840).

Almost surely, 2^9642749 is an apocalyptic number.

It is an amenable number.

9642749 is a deficient number, since it is larger than the sum of its proper divisors (275971).

9642749 is a wasteful number, since it uses less digits than its factorization.

9642749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011.

The product of its digits is 108864, while the sum is 41.

The square root of 9642749 is about 3105.2776043375. The cubic root of 9642749 is about 212.8467161108.

The spelling of 9642749 in words is "nine million, six hundred forty-two thousand, seven hundred forty-nine".