172678045 has 8 divisors (see below), whose sum is σ = 207327960. Its totient is φ = 138066240.

The previous prime is 172678039. The next prime is 172678049. The reversal of 172678045 is 540876271.

It can be written as a sum of positive squares in 4 ways, for example, as 118831801 + 53846244 = 10901^2 + 7338^2 .

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

It is not a de Polignac number, because 172678045 - 2⁷ = 172677917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172677989 and 172678007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172678049) 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, 1635 + ... + 18655.

It is an arithmetic number, because the mean of its divisors is an integer number (25915995).

Almost surely, 2^172678045 is an apocalyptic number.

It is an amenable number.

172678045 is a deficient number, since it is larger than the sum of its proper divisors (34649915).

172678045 is a wasteful number, since it uses less digits than its factorization.

172678045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19055.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 172678045 is about 13140.7018457920. The cubic root of 172678045 is about 556.8595956385.

The spelling of 172678045 in words is "one hundred seventy-two million, six hundred seventy-eight thousand, forty-five".