1389537 has 12 divisors (see below), whose sum is σ = 2020564. Its totient is φ = 920160.

The previous prime is 1389533. The next prime is 1389539. The reversal of 1389537 is 7359831.

It can be written as a sum of positive squares in 2 ways, for example, as 41616 + 1347921 = 204^2 + 1161^2 .

It is not a de Polignac number, because 1389537 - 2² = 1389533 is a prime.

It is a tribonacci number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1203 + ... + 2055.

2^1389537 is an apocalyptic number.

It is an amenable number.

1389537 is a deficient number, since it is larger than the sum of its proper divisors (631027).

1389537 is a wasteful number, since it uses less digits than its factorization.

1389537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040 (or 1037 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 1389537 is about 1178.7862401640. The cubic root of 1389537 is about 111.5895103256.

The spelling of 1389537 in words is "one million, three hundred eighty-nine thousand, five hundred thirty-seven".