1204556221 has 8 divisors (see below), whose sum is σ = 1315469088. Its totient is φ = 1093878000.

The previous prime is 1204556219. The next prime is 1204556239. The reversal of 1204556221 is 1226554021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1204556221 - 2¹ = 1204556219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1204556221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204559221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47835 + ... + 68536.

It is an arithmetic number, because the mean of its divisors is an integer number (164433636).

Almost surely, 2^1204556221 is an apocalyptic number.

1204556221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1204556221 is a deficient number, since it is larger than the sum of its proper divisors (110912867).

1204556221 is a wasteful number, since it uses less digits than its factorization.

1204556221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117323.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1204556221 is about 34706.7172316830. The cubic root of 1204556221 is about 1064.0017893034.

The spelling of 1204556221 in words is "one billion, two hundred four million, five hundred fifty-six thousand, two hundred twenty-one".