1398123 has 12 divisors (see below), whose sum is σ = 2054520. Its totient is φ = 915936.

The previous prime is 1398121. The next prime is 1398127. The reversal of 1398123 is 3218931.

It is not a de Polignac number, because 1398123 - 2¹ = 1398121 is a prime.

It is a plaindrome in base 4 and base 16.

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 11 ways as a sum of consecutive naturals, for example, 786 + ... + 1847.

It is an arithmetic number, because the mean of its divisors is an integer number (171210).

2^1398123 is an apocalyptic number.

1398123 is a deficient number, since it is larger than the sum of its proper divisors (656397).

1398123 is a wasteful number, since it uses less digits than its factorization.

1398123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698 (or 2695 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1398123 is about 1182.4225133175. The cubic root of 1398123 is about 111.8188771071.

It can be divided in two parts, 1398 and 123, that added together give a square (1521 = 39²).

The spelling of 1398123 in words is "one million, three hundred ninety-eight thousand, one hundred twenty-three".