1204456321 has 2 divisors, whose sum is σ = 1204456322. Its totient is φ = 1204456320.

The previous prime is 1204456291. The next prime is 1204456349. The reversal of 1204456321 is 1236544021.

It is an a-pointer prime, because the next prime (1204456349) can be obtained adding 1204456321 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1086625296 + 117831025 = 32964^2 + 10855^2 .

It is a cyclic number.

It is not a de Polignac number, because 1204456321 - 2⁵ = 1204456289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1204456321.

It is not a weakly prime, because it can be changed into another prime (1204450321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602228160 + 602228161.

It is an arithmetic number, because the mean of its divisors is an integer number (602228161).

Almost surely, 2^1204456321 is an apocalyptic number.

It is an amenable number.

1204456321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1204456321 is an equidigital number, since it uses as much as digits as its factorization.

1204456321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1204456321 is about 34705.2779991747. The cubic root of 1204456321 is about 1063.9723741225.

The spelling of 1204456321 in words is "one billion, two hundred four million, four hundred fifty-six thousand, three hundred twenty-one".