1398019 has 12 divisors (see below), whose sum is σ = 1647984. Its totient is φ = 1182384.

The previous prime is 1398017. The next prime is 1398031. The reversal of 1398019 is 9108931.

It is not a de Polignac number, because 1398019 - 2¹ = 1398017 is a prime.

It is a super-2 number, since 2×1398019² = 3908914248722, which contains 22 as substring.

It is a Duffinian number.

1398019 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1398011) 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, 4909 + ... + 5185.

It is an arithmetic number, because the mean of its divisors is an integer number (137332).

2^1398019 is an apocalyptic number.

1398019 is a deficient number, since it is larger than the sum of its proper divisors (249965).

1398019 is a wasteful number, since it uses less digits than its factorization.

1398019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1398019 is about 1182.3785349878. The cubic root of 1398019 is about 111.8161044727.

The spelling of 1398019 in words is "one million, three hundred ninety-eight thousand, nineteen".