1145442421 has 2 divisors, whose sum is σ = 1145442422. Its totient is φ = 1145442420.

The previous prime is 1145442373. The next prime is 1145442437. The reversal of 1145442421 is 1242445411.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1047234321 + 98208100 = 32361^2 + 9910^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145442421 - 2⁷ = 1145442293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1145442421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145442521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572721210 + 572721211.

It is an arithmetic number, because the mean of its divisors is an integer number (572721211).

Almost surely, 2^1145442421 is an apocalyptic number.

It is an amenable number.

1145442421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145442421 is an equidigital number, since it uses as much as digits as its factorization.

1145442421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5120, while the sum is 28.

The square root of 1145442421 is about 33844.3853689205. The cubic root of 1145442421 is about 1046.3036836965.

Adding to 1145442421 its reverse (1242445411), we get a palindrome (2387887832).

The spelling of 1145442421 in words is "one billion, one hundred forty-five million, four hundred forty-two thousand, four hundred twenty-one".