1204345 has 4 divisors (see below), whose sum is σ = 1445220. Its totient is φ = 963472.

The previous prime is 1204337. The next prime is 1204363. The reversal of 1204345 is 5434021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5434021 = 31 ⋅175291.

It can be written as a sum of positive squares in 2 ways, for example, as 322624 + 881721 = 568^2 + 939^2 .

It is a cyclic number.

It is not a de Polignac number, because 1204345 - 2³ = 1204337 is a prime.

1204345 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120430 + ... + 120439.

It is an arithmetic number, because the mean of its divisors is an integer number (361305).

2^1204345 is an apocalyptic number.

It is an amenable number.

1204345 is a deficient number, since it is larger than the sum of its proper divisors (240875).

1204345 is an equidigital number, since it uses as much as digits as its factorization.

1204345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240874.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 1204345 is about 1097.4265351266. The cubic root of 1204345 is about 106.3939594155.

Adding to 1204345 its reverse (5434021), we get a palindrome (6638366).

It can be divided in two parts, 120 and 4345, that added together give a triangular number (4465 = T₉₄).

The spelling of 1204345 in words is "one million, two hundred four thousand, three hundred forty-five".