1208172 has 48 divisors (see below), whose sum is σ = 3395840. Its totient is φ = 326592.

The previous prime is 1208159. The next prime is 1208177. The reversal of 1208172 is 2718021.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1208177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1218 + ... + 1974.

2^1208172 is an apocalyptic number.

1208172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1208172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1697920).

1208172 is an abundant number, since it is smaller than the sum of its proper divisors (2187668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1208172 is a wasteful number, since it uses less digits than its factorization.

1208172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790 (or 788 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1208172 is about 1099.1687768491. The cubic root of 1208172 is about 106.5065348984.

The spelling of 1208172 in words is "one million, two hundred eight thousand, one hundred seventy-two".