9897542 has 16 divisors (see below), whose sum is σ = 15386112. Its totient is φ = 4772040.

The previous prime is 9897541. The next prime is 9897571. The reversal of 9897542 is 2457989.

It is a happy number.

It is a super-2 number, since 2×9897542² = 195922675283528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9897493 and 9897502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9897541) 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, 5933 + ... + 7415.

It is an arithmetic number, because the mean of its divisors is an integer number (961632).

Almost surely, 2^9897542 is an apocalyptic number.

9897542 is a deficient number, since it is larger than the sum of its proper divisors (5488570).

9897542 is a wasteful number, since it uses less digits than its factorization.

9897542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603.

The product of its digits is 181440, while the sum is 44.

The square root of 9897542 is about 3146.0359184218. The cubic root of 9897542 is about 214.7051447599.

The spelling of 9897542 in words is "nine million, eight hundred ninety-seven thousand, five hundred forty-two".