1389157 has 8 divisors (see below), whose sum is σ = 1732032. Its totient is φ = 1082400.

The previous prime is 1389149. The next prime is 1389163. The reversal of 1389157 is 7519831.

It is a happy number.

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

It is not a de Polignac number, because 1389157 - 2³ = 1389149 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389107) 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, 8944 + ... + 9097.

It is an arithmetic number, because the mean of its divisors is an integer number (216504).

2^1389157 is an apocalyptic number.

It is an amenable number.

1389157 is a deficient number, since it is larger than the sum of its proper divisors (342875).

1389157 is a wasteful number, since it uses less digits than its factorization.

1389157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18059.

The product of its digits is 7560, while the sum is 34.

The square root of 1389157 is about 1178.6250463994. The cubic root of 1389157 is about 111.5793371816.

The spelling of 1389157 in words is "one million, three hundred eighty-nine thousand, one hundred fifty-seven".