283872121 has 8 divisors (see below), whose sum is σ = 305884040. Its totient is φ = 261885312.

The previous prime is 283872089. The next prime is 283872131. The reversal of 283872121 is 121278382.

It can be written as a sum of positive squares in 4 ways, for example, as 128595600 + 155276521 = 11340^2 + 12461^2 .

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

It is not a de Polignac number, because 283872121 - 2⁵ = 283872089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (283872131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21931 + ... + 32383.

It is an arithmetic number, because the mean of its divisors is an integer number (38235505).

Almost surely, 2^283872121 is an apocalyptic number.

It is an amenable number.

283872121 is a deficient number, since it is larger than the sum of its proper divisors (22011919).

283872121 is a wasteful number, since it uses less digits than its factorization.

283872121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12555.

The product of its digits is 10752, while the sum is 34.

The square root of 283872121 is about 16848.5050078635. The cubic root of 283872121 is about 657.2151723078.

The spelling of 283872121 in words is "two hundred eighty-three million, eight hundred seventy-two thousand, one hundred twenty-one".