10115421 has 16 divisors (see below), whose sum is σ = 13887936. Its totient is φ = 6546176.

The previous prime is 10115419. The next prime is 10115471. The reversal of 10115421 is 12451101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 10115421 - 2¹ = 10115419 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10115421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10115471) 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 15 ways as a sum of consecutive naturals, for example, 17686 + ... + 18248.

It is an arithmetic number, because the mean of its divisors is an integer number (867996).

Almost surely, 2^10115421 is an apocalyptic number.

It is an amenable number.

10115421 is a deficient number, since it is larger than the sum of its proper divisors (3772515).

10115421 is a wasteful number, since it uses less digits than its factorization.

10115421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 10115421 is about 3180.4749645297. The cubic root of 10115421 is about 216.2691902735.

Adding to 10115421 its reverse (12451101), we get a palindrome (22566522).

The spelling of 10115421 in words is "ten million, one hundred fifteen thousand, four hundred twenty-one".