1204941721 has 2 divisors, whose sum is σ = 1204941722. Its totient is φ = 1204941720.

The previous prime is 1204941707. The next prime is 1204941757. The reversal of 1204941721 is 1271494021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1128624025 + 76317696 = 33595^2 + 8736^2 .

It is a cyclic number.

It is not a de Polignac number, because 1204941721 - 2¹⁵ = 1204908953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1204941761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602470860 + 602470861.

It is an arithmetic number, because the mean of its divisors is an integer number (602470861).

Almost surely, 2^1204941721 is an apocalyptic number.

It is an amenable number.

1204941721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1204941721 is an equidigital number, since it uses as much as digits as its factorization.

1204941721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1204941721 is about 34712.2704673722. The cubic root of 1204941721 is about 1064.1152830903.

The spelling of 1204941721 in words is "one billion, two hundred four million, nine hundred forty-one thousand, seven hundred twenty-one".