1320398 has 4 divisors (see below), whose sum is σ = 1980600. Its totient is φ = 660198.

The previous prime is 1320391. The next prime is 1320409. The reversal of 1320398 is 8930231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8930231 = 29 ⋅307939.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330098 + ... + 330101.

It is an arithmetic number, because the mean of its divisors is an integer number (495150).

2^1320398 is an apocalyptic number.

1320398 is a deficient number, since it is larger than the sum of its proper divisors (660202).

1320398 is an equidigital number, since it uses as much as digits as its factorization.

1320398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660201.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1320398 is about 1149.0857235211. The cubic root of 1320398 is about 109.7071549560.

The spelling of 1320398 in words is "one million, three hundred twenty thousand, three hundred ninety-eight".