1389647125 has 16 divisors (see below), whose sum is σ = 1774618560. Its totient is φ = 1085859600.

The previous prime is 1389647113. The next prime is 1389647141. The reversal of 1389647125 is 5217469831.

It is not a de Polignac number, because 1389647125 - 2²¹ = 1387549973 is a prime.

It is a super-2 number, since 2×1389647125² = 3862238264041531250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123895 + ... + 134644.

It is an arithmetic number, because the mean of its divisors is an integer number (110913660).

Almost surely, 2^1389647125 is an apocalyptic number.

It is an amenable number.

1389647125 is a deficient number, since it is larger than the sum of its proper divisors (384971435).

1389647125 is an equidigital number, since it uses as much as digits as its factorization.

1389647125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258597 (or 258587 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The square root of 1389647125 is about 37277.9710418901. The cubic root of 1389647125 is about 1115.9245818285.

The spelling of 1389647125 in words is "one billion, three hundred eighty-nine million, six hundred forty-seven thousand, one hundred twenty-five".