1389736225 has 12 divisors (see below), whose sum is σ = 1724358384. Its totient is φ = 1111088720.

The previous prime is 1389736141. The next prime is 1389736237. The reversal of 1389736225 is 5226379831.

It is not a de Polignac number, because 1389736225 - 2²¹ = 1387639073 is a prime.

It is a Duffinian number.

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, 25002 + ... + 58348.

It is an arithmetic number, because the mean of its divisors is an integer number (143696532).

Almost surely, 2^1389736225 is an apocalyptic number.

It is an amenable number.

1389736225 is a deficient number, since it is larger than the sum of its proper divisors (334622159).

1389736225 is a wasteful number, since it uses less digits than its factorization.

1389736225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35024 (or 35019 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 1389736225 is about 37279.1660985060. The cubic root of 1389736225 is about 1115.9484312297.

The spelling of 1389736225 in words is "one billion, three hundred eighty-nine million, seven hundred thirty-six thousand, two hundred twenty-five".