1398117 has 12 divisors (see below), whose sum is σ = 2168736. Its totient is φ = 798840.

The previous prime is 1398113. The next prime is 1398121. The reversal of 1398117 is 7118931.

It is an interprime number because it is at equal distance from previous prime (1398113) and next prime (1398121).

It is not a de Polignac number, because 1398117 - 2² = 1398113 is a prime.

It is a super-2 number, since 2×1398117² = 3909462291378, which contains 22 as substring.

1398117 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4609 + ... + 4902.

It is an arithmetic number, because the mean of its divisors is an integer number (180728).

2^1398117 is an apocalyptic number.

It is an amenable number.

1398117 is a deficient number, since it is larger than the sum of its proper divisors (770619).

1398117 is an equidigital number, since it uses as much as digits as its factorization.

1398117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9528 (or 9521 counting only the distinct ones).

The product of its digits is 1512, while the sum is 30.

The square root of 1398117 is about 1182.4199761506. The cubic root of 1398117 is about 111.8187171511.

It can be divided in two parts, 139 and 8117, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 1398117 in words is "one million, three hundred ninety-eight thousand, one hundred seventeen".