1145222621 has 2 divisors, whose sum is σ = 1145222622. Its totient is φ = 1145222620.

The previous prime is 1145222591. The next prime is 1145222623. The reversal of 1145222621 is 1262225411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1143386596 + 1836025 = 33814^2 + 1355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1145222621 is a prime.

Together with 1145222623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145222623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572611310 + 572611311.

It is an arithmetic number, because the mean of its divisors is an integer number (572611311).

Almost surely, 2^1145222621 is an apocalyptic number.

It is an amenable number.

1145222621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145222621 is an equidigital number, since it uses as much as digits as its factorization.

1145222621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 26.

The square root of 1145222621 is about 33841.1379980047. The cubic root of 1145222621 is about 1046.2367540231.

The spelling of 1145222621 in words is "one billion, one hundred forty-five million, two hundred twenty-two thousand, six hundred twenty-one".