172505441 has 4 divisors (see below), whose sum is σ = 173279232. Its totient is φ = 171731652.

The previous prime is 172505429. The next prime is 172505447. The reversal of 172505441 is 144505271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 172505441 - 2¹⁰ = 172504417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172505447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386561 + ... + 387006.

It is an arithmetic number, because the mean of its divisors is an integer number (43319808).

Almost surely, 2^172505441 is an apocalyptic number.

It is an amenable number.

172505441 is a deficient number, since it is larger than the sum of its proper divisors (773791).

172505441 is an equidigital number, since it uses as much as digits as its factorization.

172505441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773790.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 172505441 is about 13134.1326702603. The cubic root of 172505441 is about 556.6739935132.

The spelling of 172505441 in words is "one hundred seventy-two million, five hundred five thousand, four hundred forty-one".