172421283 has 16 divisors (see below), whose sum is σ = 234089856. Its totient is φ = 112869120.

The previous prime is 172421251. The next prime is 172421329. The reversal of 172421283 is 382124271.

It is not a de Polignac number, because 172421283 - 2⁵ = 172421251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172421283.

It is not an unprimeable number, because it can be changed into a prime (172421203) 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, 35860 + ... + 40382.

It is an arithmetic number, because the mean of its divisors is an integer number (14630616).

Almost surely, 2^172421283 is an apocalyptic number.

172421283 is a deficient number, since it is larger than the sum of its proper divisors (61668573).

172421283 is a wasteful number, since it uses less digits than its factorization.

172421283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4754.

The product of its digits is 5376, while the sum is 30.

The square root of 172421283 is about 13130.9284896385. The cubic root of 172421283 is about 556.5834530057.

The spelling of 172421283 in words is "one hundred seventy-two million, four hundred twenty-one thousand, two hundred eighty-three".