1205172 has 24 divisors (see below), whose sum is σ = 3124800. Its totient is φ = 401688.

The previous prime is 1205159. The next prime is 1205173. The reversal of 1205172 is 2715021.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5472 + ... + 5687.

It is an arithmetic number, because the mean of its divisors is an integer number (130200).

2^1205172 is an apocalyptic number.

1205172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1205172 is an abundant number, since it is smaller than the sum of its proper divisors (1919628).

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

1205172 is a wasteful number, since it uses less digits than its factorization.

1205172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11172 (or 11164 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 1205172 is about 1097.8032610627. The cubic root of 1205172 is about 106.4183067225.

The spelling of 1205172 in words is "one million, two hundred five thousand, one hundred seventy-two".