172401105 has 16 divisors (see below), whose sum is σ = 282570624. Its totient is φ = 89704320.

The previous prime is 172401083. The next prime is 172401121. The reversal of 172401105 is 501104271.

It is a happy number.

It is not a de Polignac number, because 172401105 - 2⁹ = 172400593 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139549 + ... + 140778.

It is an arithmetic number, because the mean of its divisors is an integer number (17660664).

Almost surely, 2^172401105 is an apocalyptic number.

172401105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172401105 is a deficient number, since it is larger than the sum of its proper divisors (110169519).

172401105 is a wasteful number, since it uses less digits than its factorization.

172401105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280376.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 172401105 is about 13130.1601284981. The cubic root of 172401105 is about 556.5617403361.

Adding to 172401105 its reverse (501104271), we get a palindrome (673505376).

The spelling of 172401105 in words is "one hundred seventy-two million, four hundred one thousand, one hundred five".