1305398 has 4 divisors (see below), whose sum is σ = 1958100. Its totient is φ = 652698.

The previous prime is 1305391. The next prime is 1305401. The reversal of 1305398 is 8935031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8935031 = 7 ⋅1276433.

It is a self number, because there is not a number n which added to its sum of digits gives 1305398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326348 + ... + 326351.

It is an arithmetic number, because the mean of its divisors is an integer number (489525).

2^1305398 is an apocalyptic number.

1305398 is a deficient number, since it is larger than the sum of its proper divisors (652702).

1305398 is an equidigital number, since it uses as much as digits as its factorization.

1305398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652701.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 1305398 is about 1142.5401524673. The cubic root of 1305398 is about 109.2901396734.

The spelling of 1305398 in words is "one million, three hundred five thousand, three hundred ninety-eight".