1389057 has 8 divisors (see below), whose sum is σ = 1875840. Its totient is φ = 914160.

The previous prime is 1389007. The next prime is 1389083. The reversal of 1389057 is 7509831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1389057 - 2¹² = 1384961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1389007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2694 + ... + 3167.

It is an arithmetic number, because the mean of its divisors is an integer number (234480).

2^1389057 is an apocalyptic number.

It is an amenable number.

1389057 is a deficient number, since it is larger than the sum of its proper divisors (486783).

1389057 is an equidigital number, since it uses as much as digits as its factorization.

1389057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5943.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 1389057 is about 1178.5826233235. The cubic root of 1389057 is about 111.5766597301.

The spelling of 1389057 in words is "one million, three hundred eighty-nine thousand, fifty-seven".