125448584021 has 2 divisors, whose sum is σ = 125448584022. Its totient is φ = 125448584020.

The previous prime is 125448583993. The next prime is 125448584029. The reversal of 125448584021 is 120485844521.

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., 120329896996 + 5118687025 = 346886^2 + 71545^2 .

It is a cyclic number.

It is not a de Polignac number, because 125448584021 - 2¹⁰ = 125448582997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125448584029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62724292010 + 62724292011.

It is an arithmetic number, because the mean of its divisors is an integer number (62724292011).

Almost surely, 2^125448584021 is an apocalyptic number.

It is an amenable number.

125448584021 is a deficient number, since it is larger than the sum of its proper divisors (1).

125448584021 is an equidigital number, since it uses as much as digits as its factorization.

125448584021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 409600, while the sum is 44.

The spelling of 125448584021 in words is "one hundred twenty-five billion, four hundred forty-eight million, five hundred eighty-four thousand, twenty-one".