1152225421 has 2 divisors, whose sum is σ = 1152225422. Its totient is φ = 1152225420.

The previous prime is 1152225413. The next prime is 1152225427. The reversal of 1152225421 is 1245222511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 941569225 + 210656196 = 30685^2 + 14514^2 .

It is a cyclic number.

It is not a de Polignac number, because 1152225421 - 2³ = 1152225413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1152225427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576112710 + 576112711.

It is an arithmetic number, because the mean of its divisors is an integer number (576112711).

Almost surely, 2^1152225421 is an apocalyptic number.

It is an amenable number.

1152225421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1152225421 is an equidigital number, since it uses as much as digits as its factorization.

1152225421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1600, while the sum is 25.

The square root of 1152225421 is about 33944.4460994726. The cubic root of 1152225421 is about 1048.3649293984.

Adding to 1152225421 its reverse (1245222511), we get a palindrome (2397447932).

The spelling of 1152225421 in words is "one billion, one hundred fifty-two million, two hundred twenty-five thousand, four hundred twenty-one".