1398269 has 2 divisors, whose sum is σ = 1398270. Its totient is φ = 1398268.

The previous prime is 1398263. The next prime is 1398281. The reversal of 1398269 is 9628931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1026169 + 372100 = 1013^2 + 610^2 .

It is a cyclic number.

It is not a de Polignac number, because 1398269 - 2¹⁶ = 1332733 is a prime.

It is a super-2 number, since 2×1398269² = 3910312392722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1398263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699134 + 699135.

It is an arithmetic number, because the mean of its divisors is an integer number (699135).

2^1398269 is an apocalyptic number.

It is an amenable number.

1398269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398269 is an equidigital number, since it uses as much as digits as its factorization.

1398269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 1398269 is about 1182.4842493666. The cubic root of 1398269 is about 111.8227692271.

The spelling of 1398269 in words is "one million, three hundred ninety-eight thousand, two hundred sixty-nine".