1125627221 has 2 divisors, whose sum is σ = 1125627222. Its totient is φ = 1125627220.

The previous prime is 1125627149. The next prime is 1125627247. The reversal of 1125627221 is 1227265211.

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., 601720900 + 523906321 = 24530^2 + 22889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1125627221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125627281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562813610 + 562813611.

It is an arithmetic number, because the mean of its divisors is an integer number (562813611).

Almost surely, 2^1125627221 is an apocalyptic number.

It is an amenable number.

1125627221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125627221 is an equidigital number, since it uses as much as digits as its factorization.

1125627221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 29.

The square root of 1125627221 is about 33550.3684182454. The cubic root of 1125627221 is about 1040.2351603950.

The spelling of 1125627221 in words is "one billion, one hundred twenty-five million, six hundred twenty-seven thousand, two hundred twenty-one".