125222789 has 2 divisors, whose sum is σ = 125222790. Its totient is φ = 125222788.

The previous prime is 125222777. The next prime is 125222791. The reversal of 125222789 is 987222521.

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., 99161764 + 26061025 = 9958^2 + 5105^2 .

It is a cyclic number.

It is not a de Polignac number, because 125222789 - 2²⁰ = 124174213 is a prime.

It is a Sophie Germain prime.

Together with 125222791, it forms a pair of twin primes.

It is a Chen 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 (125222089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62611394 + 62611395.

It is an arithmetic number, because the mean of its divisors is an integer number (62611395).

Almost surely, 2^125222789 is an apocalyptic number.

It is an amenable number.

125222789 is a deficient number, since it is larger than the sum of its proper divisors (1).

125222789 is an equidigital number, since it uses as much as digits as its factorization.

125222789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 38.

The square root of 125222789 is about 11190.2988789397. The cubic root of 125222789 is about 500.2968756948.

The spelling of 125222789 in words is "one hundred twenty-five million, two hundred twenty-two thousand, seven hundred eighty-nine".