10399121 has 8 divisors (see below), whose sum is σ = 11044584. Its totient is φ = 9757440.

The previous prime is 10399073. The next prime is 10399127. The reversal of 10399121 is 12199301.

It can be written as a sum of positive squares in 4 ways, for example, as 2356225 + 8042896 = 1535^2 + 2836^2 .

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 10399121 - 2⁶ = 10399057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10399127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6431 + ... + 7883.

It is an arithmetic number, because the mean of its divisors is an integer number (1380573).

Almost surely, 2^10399121 is an apocalyptic number.

It is an amenable number.

10399121 is a deficient number, since it is larger than the sum of its proper divisors (645463).

10399121 is a wasteful number, since it uses less digits than its factorization.

10399121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 10399121 is about 3224.7668132750. The cubic root of 10399121 is about 218.2724268598.

The spelling of 10399121 in words is "ten million, three hundred ninety-nine thousand, one hundred twenty-one".