1220609204 has 6 divisors (see below), whose sum is σ = 2136066114. Its totient is φ = 610304600.

The previous prime is 1220609189. The next prime is 1220609213. The reversal of 1220609204 is 4029060221.

It can be written as a sum of positive squares in only one way, i.e., 675480100 + 545129104 = 25990^2 + 23348^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152576147 + ... + 152576154.

It is an arithmetic number, because the mean of its divisors is an integer number (356011019).

Almost surely, 2^1220609204 is an apocalyptic number.

It is an amenable number.

1220609204 is a deficient number, since it is larger than the sum of its proper divisors (915456910).

1220609204 is a wasteful number, since it uses less digits than its factorization.

1220609204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305152305 (or 305152303 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1220609204 is about 34937.2180346404. The cubic root of 1220609204 is about 1068.7075564509.

Adding to 1220609204 its reverse (4029060221), we get a palindrome (5249669425).

The spelling of 1220609204 in words is "one billion, two hundred twenty million, six hundred nine thousand, two hundred four".