9942591 has 8 divisors (see below), whose sum is σ = 13296384. Its totient is φ = 6608600.

The previous prime is 9942587. The next prime is 9942593. The reversal of 9942591 is 1952499.

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

It is a cyclic number.

It is not a de Polignac number, because 9942591 - 2² = 9942587 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9942593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3735 + ... + 5816.

It is an arithmetic number, because the mean of its divisors is an integer number (1662048).

Almost surely, 2^9942591 is an apocalyptic number.

9942591 is a deficient number, since it is larger than the sum of its proper divisors (3353793).

9942591 is a wasteful number, since it uses less digits than its factorization.

9942591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9901.

The product of its digits is 29160, while the sum is 39.

The square root of 9942591 is about 3153.1874349616. The cubic root of 9942591 is about 215.0303977211.

The spelling of 9942591 in words is "nine million, nine hundred forty-two thousand, five hundred ninety-one".