1389425625 has 135 divisors (see below), whose sum is σ = 2959000473. Its totient is φ = 626220000.

The previous prime is 1389425617. The next prime is 1389425627. The reversal of 1389425625 is 5265249831.

The square root of 1389425625 is 37275.

It is a perfect power (a square), and thus also a powerful number.

1389425625 is a `hidden beast` number, since 1 + 3 + 89 + 4 + 2 + 562 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 108930969 + 1280494656 = 10437^2 + 35784^2 .

It is not a de Polignac number, because 1389425625 - 2³ = 1389425617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1389425627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 19569340 + ... + 19569410.

Almost surely, 2^1389425625 is an apocalyptic number.

1389425625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1389425625 is the 37275-th square number.

1389425625 is the 18638-th centered octagonal number.

It is an amenable number.

1389425625 is an abundant number, since it is smaller than the sum of its proper divisors (1569574848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1389425625 is an frugal number, since it uses more digits than its factorization.

1389425625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 86 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The cubic root of 1389425625 is about 1115.8652884956.

Multiplying 1389425625 by its product of digits (518400), we get a square (720278244000000 = 26838000²).

The spelling of 1389425625 in words is "one billion, three hundred eighty-nine million, four hundred twenty-five thousand, six hundred twenty-five".