1897172 has 12 divisors (see below), whose sum is σ = 3370080. Its totient is φ = 934296.

The previous prime is 1897171. The next prime is 1897177. The reversal of 1897172 is 2717981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3272 + ... + 3807.

It is an arithmetic number, because the mean of its divisors is an integer number (280840).

2^1897172 is an apocalyptic number.

It is an amenable number.

1897172 is a deficient number, since it is larger than the sum of its proper divisors (1472908).

1897172 is a wasteful number, since it uses less digits than its factorization.

1897172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7150 (or 7148 counting only the distinct ones).

The product of its digits is 7056, while the sum is 35.

The square root of 1897172 is about 1377.3786697927. The cubic root of 1897172 is about 123.7947523750.

The spelling of 1897172 in words is "one million, eight hundred ninety-seven thousand, one hundred seventy-two".