9961572 has 12 divisors (see below), whose sum is σ = 23243696. Its totient is φ = 3320520.

The previous prime is 9961543. The next prime is 9961573. The reversal of 9961572 is 2751699.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×9961572² = 198465833422368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9961572.

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 3 ways as a sum of consecutive naturals, for example, 415054 + ... + 415077.

Almost surely, 2^9961572 is an apocalyptic number.

It is an amenable number.

9961572 is an abundant number, since it is smaller than the sum of its proper divisors (13282124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9961572 is a wasteful number, since it uses less digits than its factorization.

9961572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830138 (or 830136 counting only the distinct ones).

The product of its digits is 34020, while the sum is 39.

The square root of 9961572 is about 3156.1958114160. The cubic root of 9961572 is about 215.1671460281.

The spelling of 9961572 in words is "nine million, nine hundred sixty-one thousand, five hundred seventy-two".