9742521 has 16 divisors (see below), whose sum is σ = 13570560. Its totient is φ = 6209280.

The previous prime is 9742511. The next prime is 9742541. The reversal of 9742521 is 1252479.

It is not a de Polignac number, because 9742521 - 2⁷ = 9742393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9742511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9336 + ... + 10326.

It is an arithmetic number, because the mean of its divisors is an integer number (848160).

Almost surely, 2^9742521 is an apocalyptic number.

It is an amenable number.

9742521 is a deficient number, since it is larger than the sum of its proper divisors (3828039).

9742521 is a wasteful number, since it uses less digits than its factorization.

9742521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136.

The product of its digits is 5040, while the sum is 30.

The square root of 9742521 is about 3121.3011709862. The cubic root of 9742521 is about 213.5782958140.

The spelling of 9742521 in words is "nine million, seven hundred forty-two thousand, five hundred twenty-one".