1200172 has 6 divisors (see below), whose sum is σ = 2100308. Its totient is φ = 600084.

The previous prime is 1200167. The next prime is 1200179. The reversal of 1200172 is 2710021.

It is not an unprimeable number, because it can be changed into a prime (1200179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150018 + ... + 150025.

2^1200172 is an apocalyptic number.

It is an amenable number.

1200172 is a deficient number, since it is larger than the sum of its proper divisors (900136).

1200172 is a wasteful number, since it uses less digits than its factorization.

1200172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300047 (or 300045 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 1200172 is about 1095.5236190973. The cubic root of 1200172 is about 106.2709338222.

Adding to 1200172 its reverse (2710021), we get a palindrome (3910193).

The spelling of 1200172 in words is "one million, two hundred thousand, one hundred seventy-two".