172401116 has 12 divisors (see below), whose sum is σ = 301852488. Its totient is φ = 86157552.

The previous prime is 172401083. The next prime is 172401121. The reversal of 172401116 is 611104271.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 172401091 and 172401100.

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 3 ways as a sum of consecutive naturals, for example, 686 + ... + 18581.

It is an arithmetic number, because the mean of its divisors is an integer number (25154374).

Almost surely, 2^172401116 is an apocalyptic number.

It is an amenable number.

172401116 is a deficient number, since it is larger than the sum of its proper divisors (129451372).

172401116 is a wasteful number, since it uses less digits than its factorization.

172401116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21508 (or 21506 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 172401116 is about 13130.1605473810. The cubic root of 172401116 is about 556.5617521732.

Adding to 172401116 its reverse (611104271), we get a palindrome (783505387).

The spelling of 172401116 in words is "one hundred seventy-two million, four hundred one thousand, one hundred sixteen".