1389951 has 6 divisors (see below), whose sum is σ = 2007720. Its totient is φ = 926628.

The previous prime is 1389943. The next prime is 1389961. The reversal of 1389951 is 1599831.

It is a happy number.

It is not a de Polignac number, because 1389951 - 2³ = 1389943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77211 + ... + 77228.

It is an arithmetic number, because the mean of its divisors is an integer number (334620).

2^1389951 is an apocalyptic number.

1389951 is a deficient number, since it is larger than the sum of its proper divisors (617769).

1389951 is a wasteful number, since it uses less digits than its factorization.

1389951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154445 (or 154442 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 1389951 is about 1178.9618314432. The cubic root of 1389951 is about 111.6005915874.

The spelling of 1389951 in words is "one million, three hundred eighty-nine thousand, nine hundred fifty-one".