1220375 has 16 divisors (see below), whose sum is σ = 1642368. Its totient is φ = 900000.

The previous prime is 1220369. The next prime is 1220393. The reversal of 1220375 is 5730221.

It is not a de Polignac number, because 1220375 - 2²⁰ = 171799 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1250 + ... + 2000.

It is an arithmetic number, because the mean of its divisors is an integer number (102648).

2^1220375 is an apocalyptic number.

1220375 is a deficient number, since it is larger than the sum of its proper divisors (421993).

1220375 is an equidigital number, since it uses as much as digits as its factorization.

1220375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779 (or 769 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 1220375 is about 1104.7058431999. The cubic root of 1220375 is about 106.8639199439.

Adding to 1220375 its reverse (5730221), we get a palindrome (6950596).

The spelling of 1220375 in words is "one million, two hundred twenty thousand, three hundred seventy-five".