125985553 has 2 divisors, whose sum is σ = 125985554. Its totient is φ = 125985552.

The previous prime is 125985547. The next prime is 125985577. The reversal of 125985553 is 355589521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117874449 + 8111104 = 10857^2 + 2848^2 .

It is a cyclic number.

It is not a de Polignac number, because 125985553 - 2²⁵ = 92431121 is a prime.

It is not a weakly prime, because it can be changed into another prime (125985533) 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, 62992776 + 62992777.

It is an arithmetic number, because the mean of its divisors is an integer number (62992777).

Almost surely, 2^125985553 is an apocalyptic number.

It is an amenable number.

125985553 is a deficient number, since it is larger than the sum of its proper divisors (1).

125985553 is an equidigital number, since it uses as much as digits as its factorization.

125985553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270000, while the sum is 43.

The square root of 125985553 is about 11224.3286213475. The cubic root of 125985553 is about 501.3106321516.

The spelling of 125985553 in words is "one hundred twenty-five million, nine hundred eighty-five thousand, five hundred fifty-three".