172858481 has 2 divisors, whose sum is σ = 172858482. Its totient is φ = 172858480.

The previous prime is 172858463. The next prime is 172858507. The reversal of 172858481 is 184858271.

172858481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146797456 + 26061025 = 12116^2 + 5105^2 .

It is a cyclic number.

It is not a de Polignac number, because 172858481 - 2⁶ = 172858417 is a prime.

It is a super-2 number, since 2×172858481² = 59760108907254722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (672858481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86429240 + 86429241.

It is an arithmetic number, because the mean of its divisors is an integer number (86429241).

Almost surely, 2^172858481 is an apocalyptic number.

It is an amenable number.

172858481 is a deficient number, since it is larger than the sum of its proper divisors (1).

172858481 is an equidigital number, since it uses as much as digits as its factorization.

172858481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 143360, while the sum is 44.

The square root of 172858481 is about 13147.5655921543. The cubic root of 172858481 is about 557.0534873809.

The spelling of 172858481 in words is "one hundred seventy-two million, eight hundred fifty-eight thousand, four hundred eighty-one".