9961575 has 48 divisors (see below), whose sum is σ = 18811296. Its totient is φ = 4608000.

The previous prime is 9961573. The next prime is 9961579. The reversal of 9961575 is 5751699.

It is not a de Polignac number, because 9961575 - 2¹ = 9961573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9961573) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16275 + ... + 16875.

It is an arithmetic number, because the mean of its divisors is an integer number (391902).

Almost surely, 2^9961575 is an apocalyptic number.

9961575 is a deficient number, since it is larger than the sum of its proper divisors (8849721).

9961575 is a wasteful number, since it uses less digits than its factorization.

9961575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644 (or 639 counting only the distinct ones).

The product of its digits is 85050, while the sum is 42.

The square root of 9961575 is about 3156.1962866717. The cubic root of 9961575 is about 215.1671676279.

The spelling of 9961575 in words is "nine million, nine hundred sixty-one thousand, five hundred seventy-five".