4291172921 has 8 divisors (see below), whose sum is σ = 4911974784. Its totient is φ = 3672315360.

The previous prime is 4291172911. The next prime is 4291172927. The reversal of 4291172921 is 1292711924.

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

It is not a de Polignac number, because 4291172921 - 2¹⁰ = 4291171897 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 (4291172927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481340 + ... + 490173.

It is an arithmetic number, because the mean of its divisors is an integer number (613996848).

Almost surely, 2^4291172921 is an apocalyptic number.

It is an amenable number.

4291172921 is a deficient number, since it is larger than the sum of its proper divisors (620801863).

4291172921 is an equidigital number, since it uses as much as digits as its factorization.

4291172921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972151.

The product of its digits is 18144, while the sum is 38.

The square root of 4291172921 is about 65507.0448196223. The cubic root of 4291172921 is about 1625.0198556627.

The spelling of 4291172921 in words is "four billion, two hundred ninety-one million, one hundred seventy-two thousand, nine hundred twenty-one".