1220398 has 4 divisors (see below), whose sum is σ = 1830600. Its totient is φ = 610198.

The previous prime is 1220393. The next prime is 1220411. The reversal of 1220398 is 8930221.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305098 + ... + 305101.

It is an arithmetic number, because the mean of its divisors is an integer number (457650).

2^1220398 is an apocalyptic number.

1220398 is a deficient number, since it is larger than the sum of its proper divisors (610202).

1220398 is an equidigital number, since it uses as much as digits as its factorization.

1220398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610201.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1220398 is about 1104.7162531619. The cubic root of 1220398 is about 106.8645912825.

The spelling of 1220398 in words is "one million, two hundred twenty thousand, three hundred ninety-eight".