10120391 has 8 divisors (see below), whose sum is σ = 10925280. Its totient is φ = 9345952.

The previous prime is 10120387. The next prime is 10120421. The reversal of 10120391 is 19302101.

It is a happy number.

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 10120391 - 2² = 10120387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10120361) 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, 6920 + ... + 8253.

It is an arithmetic number, because the mean of its divisors is an integer number (1365660).

Almost surely, 2^10120391 is an apocalyptic number.

10120391 is a deficient number, since it is larger than the sum of its proper divisors (804889).

10120391 is a wasteful number, since it uses less digits than its factorization.

10120391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15225.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 10120391 is about 3181.2561984223. The cubic root of 10120391 is about 216.3046042515.

Adding to 10120391 its reverse (19302101), we get a palindrome (29422492).

The spelling of 10120391 in words is "ten million, one hundred twenty thousand, three hundred ninety-one".