9951121 has 8 divisors (see below), whose sum is σ = 10186560. Its totient is φ = 9717552.

The previous prime is 9951101. The next prime is 9951127. The reversal of 9951121 is 1211599.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9951121 - 2⁹ = 9950609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9951121.

It is not an unprimeable number, because it can be changed into a prime (9951127) 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, 18766 + ... + 19288.

It is an arithmetic number, because the mean of its divisors is an integer number (1273320).

Almost surely, 2^9951121 is an apocalyptic number.

It is an amenable number.

9951121 is a deficient number, since it is larger than the sum of its proper divisors (235439).

9951121 is a wasteful number, since it uses less digits than its factorization.

9951121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935.

The product of its digits is 810, while the sum is 28.

The square root of 9951121 is about 3154.5397445586. The cubic root of 9951121 is about 215.0918734808.

It can be divided in two parts, 995 and 1121, that added together give a square (2116 = 46²).

The spelling of 9951121 in words is "nine million, nine hundred fifty-one thousand, one hundred twenty-one".