1398725 has 6 divisors (see below), whose sum is σ = 1734450. Its totient is φ = 1118960.

The previous prime is 1398721. The next prime is 1398731. The reversal of 1398725 is 5278931.

It can be written as a sum of positive squares in 3 ways, for example, as 20449 + 1378276 = 143^2 + 1174^2 .

It is not a de Polignac number, because 1398725 - 2² = 1398721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27950 + ... + 27999.

It is an arithmetic number, because the mean of its divisors is an integer number (289075).

2^1398725 is an apocalyptic number.

It is an amenable number.

1398725 is a deficient number, since it is larger than the sum of its proper divisors (335725).

1398725 is an equidigital number, since it uses as much as digits as its factorization.

1398725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55959 (or 55954 counting only the distinct ones).

The product of its digits is 15120, while the sum is 35.

The square root of 1398725 is about 1182.6770480567. The cubic root of 1398725 is about 111.8349236935.

The spelling of 1398725 in words is "one million, three hundred ninety-eight thousand, seven hundred twenty-five".