1321172 has 12 divisors (see below), whose sum is σ = 2448180. Its totient is φ = 621696.

The previous prime is 1321171. The next prime is 1321193. The reversal of 1321172 is 2711231.

It can be written as a sum of positive squares in 2 ways, for example, as 391876 + 929296 = 626^2 + 964^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 1321172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321171) 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, 9647 + ... + 9782.

It is an arithmetic number, because the mean of its divisors is an integer number (204015).

2^1321172 is an apocalyptic number.

It is an amenable number.

1321172 is a deficient number, since it is larger than the sum of its proper divisors (1127008).

1321172 is a wasteful number, since it uses less digits than its factorization.

1321172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19450 (or 19448 counting only the distinct ones).

The product of its digits is 84, while the sum is 17.

The square root of 1321172 is about 1149.4224636747. The cubic root of 1321172 is about 109.7285870675.

The spelling of 1321172 in words is "one million, three hundred twenty-one thousand, one hundred seventy-two".