172620122 has 8 divisors (see below), whose sum is σ = 267858900. Its totient is φ = 83333824.

The previous prime is 172620101. The next prime is 172620157. The reversal of 172620122 is 221026271.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 168454441 + 4165681 = 12979^2 + 2041^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1488047 + ... + 1488162.

Almost surely, 2^172620122 is an apocalyptic number.

172620122 is a deficient number, since it is larger than the sum of its proper divisors (95238778).

172620122 is a wasteful number, since it uses less digits than its factorization.

172620122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976240.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 172620122 is about 13138.4977071201. The cubic root of 172620122 is about 556.7973244803.

Adding to 172620122 its reverse (221026271), we get a palindrome (393646393).

The spelling of 172620122 in words is "one hundred seventy-two million, six hundred twenty thousand, one hundred twenty-two".