9997515 has 48 divisors (see below), whose sum is σ = 19918080. Its totient is φ = 4587840.

The previous prime is 9997483. The next prime is 9997517. The reversal of 9997515 is 5157999.

It is not a de Polignac number, because 9997515 - 2⁵ = 9997483 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (9997517) 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 47 ways as a sum of consecutive naturals, for example, 8874 + ... + 9936.

It is an arithmetic number, because the mean of its divisors is an integer number (414960).

Almost surely, 2^9997515 is an apocalyptic number.

9997515 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

9997515 is a deficient number, since it is larger than the sum of its proper divisors (9920565).

9997515 is a wasteful number, since it uses less digits than its factorization.

9997515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104 (or 1101 counting only the distinct ones).

The product of its digits is 127575, while the sum is 45.

The square root of 9997515 is about 3161.8847227563. The cubic root of 9997515 is about 215.4256216241.

The spelling of 9997515 in words is "nine million, nine hundred ninety-seven thousand, five hundred fifteen".