125447551 has 2 divisors, whose sum is σ = 125447552. Its totient is φ = 125447550.

The previous prime is 125447521. The next prime is 125447563. The reversal of 125447551 is 155744521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125447551 - 2¹⁹ = 124923263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125447521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62723775 + 62723776.

It is an arithmetic number, because the mean of its divisors is an integer number (62723776).

Almost surely, 2^125447551 is an apocalyptic number.

125447551 is a deficient number, since it is larger than the sum of its proper divisors (1).

125447551 is an equidigital number, since it uses as much as digits as its factorization.

125447551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28000, while the sum is 34.

The square root of 125447551 is about 11200.3370931414. The cubic root of 125447551 is about 500.5960238954.

The spelling of 125447551 in words is "one hundred twenty-five million, four hundred forty-seven thousand, five hundred fifty-one".