172401117 has 32 divisors (see below), whose sum is σ = 280704000. Its totient is φ = 91922688.

The previous prime is 172401083. The next prime is 172401121. The reversal of 172401117 is 711104271.

172401117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172401117 - 2¹⁰ = 172400093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172401157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23509 + ... + 29957.

It is an arithmetic number, because the mean of its divisors is an integer number (8772000).

Almost surely, 2^172401117 is an apocalyptic number.

It is an amenable number.

172401117 is a deficient number, since it is larger than the sum of its proper divisors (108302883).

172401117 is a wasteful number, since it uses less digits than its factorization.

172401117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6545.

The product of its (nonzero) digits is 392, while the sum is 24.

The square root of 172401117 is about 13130.1605854612. The cubic root of 172401117 is about 556.5617532493.

Adding to 172401117 its reverse (711104271), we get a palindrome (883505388).

The spelling of 172401117 in words is "one hundred seventy-two million, four hundred one thousand, one hundred seventeen".