125226989 has 2 divisors, whose sum is σ = 125226990. Its totient is φ = 125226988.

The previous prime is 125226979. The next prime is 125227001. The reversal of 125226989 is 989622521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108889225 + 16337764 = 10435^2 + 4042^2 .

It is an emirp because it is prime and its reverse (989622521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125226989 - 2¹² = 125222893 is a prime.

It is a super-2 number, since 2×125226989² = 31363597548012242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125226979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62613494 + 62613495.

It is an arithmetic number, because the mean of its divisors is an integer number (62613495).

Almost surely, 2^125226989 is an apocalyptic number.

It is an amenable number.

125226989 is a deficient number, since it is larger than the sum of its proper divisors (1).

125226989 is an equidigital number, since it uses as much as digits as its factorization.

125226989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 44.

The square root of 125226989 is about 11190.4865399142. The cubic root of 125226989 is about 500.3024689881.

The spelling of 125226989 in words is "one hundred twenty-five million, two hundred twenty-six thousand, nine hundred eighty-nine".