10071921 has 4 divisors (see below), whose sum is σ = 13429232. Its totient is φ = 6714612.

The previous prime is 10071913. The next prime is 10071923. The reversal of 10071921 is 12917001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 10071921 - 2³ = 10071913 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10071923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1678651 + ... + 1678656.

It is an arithmetic number, because the mean of its divisors is an integer number (3357308).

Almost surely, 2^10071921 is an apocalyptic number.

It is an amenable number.

10071921 is a deficient number, since it is larger than the sum of its proper divisors (3357311).

10071921 is an equidigital number, since it uses as much as digits as its factorization.

10071921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3357310.

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 10071921 is about 3173.6289953301. The cubic root of 10071921 is about 215.9587326856.

Adding to 10071921 its reverse (12917001), we get a palindrome (22988922).

The spelling of 10071921 in words is "ten million, seventy-one thousand, nine hundred twenty-one".