1398125 has 10 divisors (see below), whose sum is σ = 1747878. Its totient is φ = 1118000.

The previous prime is 1398121. The next prime is 1398127. The reversal of 1398125 is 5218931.

It can be written as a sum of positive squares in 5 ways, for example, as 343396 + 1054729 = 586^2 + 1027^2 .

It is not a de Polignac number, because 1398125 - 2² = 1398121 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398121) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 494 + ... + 1743.

2^1398125 is an apocalyptic number.

It is an amenable number.

1398125 is a deficient number, since it is larger than the sum of its proper divisors (349753).

1398125 is an frugal number, since it uses more digits than its factorization.

1398125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257 (or 2242 counting only the distinct ones).

The product of its digits is 2160, while the sum is 29.

The square root of 1398125 is about 1182.4233590385. The cubic root of 1398125 is about 111.8189304256.

The spelling of 1398125 in words is "one million, three hundred ninety-eight thousand, one hundred twenty-five".