618172 has 6 divisors (see below), whose sum is σ = 1081808. Its totient is φ = 309084.

The previous prime is 618161. The next prime is 618173. The reversal of 618172 is 271816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618173) by changing a digit.

618172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77268 + ... + 77275.

2⁶¹⁸¹⁷² is an apocalyptic number.

It is an amenable number.

618172 is a deficient number, since it is larger than the sum of its proper divisors (463636).

618172 is a wasteful number, since it uses less digits than its factorization.

618172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154547 (or 154545 counting only the distinct ones).

The product of its digits is 672, while the sum is 25.

The square root of 618172 is about 786.2391493687. The cubic root of 618172 is about 85.1863041604.

Adding to 618172 its reverse (271816), we get a palindrome (889988).

The spelling of 618172 in words is "six hundred eighteen thousand, one hundred seventy-two".