9947742 has 32 divisors (see below), whose sum is σ = 22831872. Its totient is φ = 2830464.

The previous prime is 9947741. The next prime is 9947761. The reversal of 9947742 is 2477499.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 9947694 and 9947703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9947741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17913 + ... + 18459.

It is an arithmetic number, because the mean of its divisors is an integer number (713496).

Almost surely, 2^9947742 is an apocalyptic number.

9947742 is an abundant number, since it is smaller than the sum of its proper divisors (12884130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9947742 is a wasteful number, since it uses less digits than its factorization.

9947742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992.

The product of its digits is 127008, while the sum is 42.

The square root of 9947742 is about 3154.0041217475. The cubic root of 9947742 is about 215.0675252116.

The spelling of 9947742 in words is "nine million, nine hundred forty-seven thousand, seven hundred forty-two".