9901512 has 48 divisors (see below), whose sum is σ = 27076140. Its totient is φ = 3268608.

The previous prime is 9901457. The next prime is 9901543. The reversal of 9901512 is 2151099.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8328996 + 1572516 = 2886^2 + 1254^2 .

It is a super-2 number, since 2×9901512² = 196079879772288, which contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 7528 + ... + 8744.

Almost surely, 2^9901512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9901512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13538070).

9901512 is an abundant number, since it is smaller than the sum of its proper divisors (17174628).

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

9901512 is a wasteful number, since it uses less digits than its factorization.

9901512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342 (or 1335 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 9901512 is about 3146.6668079096. Note that the first 3 decimals coincide. The cubic root of 9901512 is about 214.7338476939.

The spelling of 9901512 in words is "nine million, nine hundred one thousand, five hundred twelve".