1389025 has 12 divisors (see below), whose sum is σ = 1879344. Its totient is φ = 1010000.

The previous prime is 1389007. The next prime is 1389083. The reversal of 1389025 is 5209831.

It is not a de Polignac number, because 1389025 - 2¹¹ = 1386977 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1388984 and 1389002.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2251 + ... + 2800.

It is an arithmetic number, because the mean of its divisors is an integer number (156612).

2^1389025 is an apocalyptic number.

It is an amenable number.

1389025 is a deficient number, since it is larger than the sum of its proper divisors (490319).

1389025 is a wasteful number, since it uses less digits than its factorization.

1389025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5072 (or 5067 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1389025 is about 1178.5690476166. The cubic root of 1389025 is about 111.5758029185.

The spelling of 1389025 in words is "one million, three hundred eighty-nine thousand, twenty-five".