172771045 has 8 divisors (see below), whose sum is σ = 210245760. Its totient is φ = 136269840.

The previous prime is 172771037. The next prime is 172771063. The reversal of 172771045 is 540177271.

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

It is not a de Polignac number, because 172771045 - 2³ = 172771037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172771045.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 242985 + ... + 243694.

It is an arithmetic number, because the mean of its divisors is an integer number (26280720).

Almost surely, 2^172771045 is an apocalyptic number.

It is an amenable number.

172771045 is a deficient number, since it is larger than the sum of its proper divisors (37474715).

172771045 is an equidigital number, since it uses as much as digits as its factorization.

172771045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486755.

The product of its (nonzero) digits is 13720, while the sum is 34.

The square root of 172771045 is about 13144.2399932442. The cubic root of 172771045 is about 556.9595478317.

The spelling of 172771045 in words is "one hundred seventy-two million, seven hundred seventy-one thousand, forty-five".