1389172 has 24 divisors (see below), whose sum is σ = 2661120. Its totient is φ = 631680.

The previous prime is 1389169. The next prime is 1389173. The reversal of 1389172 is 2719831.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389173) 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, 1779 + ... + 2437.

It is an arithmetic number, because the mean of its divisors is an integer number (110880).

2^1389172 is an apocalyptic number.

It is an amenable number.

1389172 is a deficient number, since it is larger than the sum of its proper divisors (1271948).

1389172 is a wasteful number, since it uses less digits than its factorization.

1389172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711 (or 709 counting only the distinct ones).

The product of its digits is 3024, while the sum is 31.

The square root of 1389172 is about 1178.6314097291. The cubic root of 1389172 is about 111.5797387882.

The spelling of 1389172 in words is "one million, three hundred eighty-nine thousand, one hundred seventy-two".