125561567 has 2 divisors, whose sum is σ = 125561568. Its totient is φ = 125561566.

The previous prime is 125561549. The next prime is 125561587. The reversal of 125561567 is 765165521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125561567 - 2¹⁰ = 125560543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125561567.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125561537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62780783 + 62780784.

It is an arithmetic number, because the mean of its divisors is an integer number (62780784).

Almost surely, 2^125561567 is an apocalyptic number.

125561567 is a deficient number, since it is larger than the sum of its proper divisors (1).

125561567 is an equidigital number, since it uses as much as digits as its factorization.

125561567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63000, while the sum is 38.

The square root of 125561567 is about 11205.4257839673. The cubic root of 125561567 is about 500.7476375191.

The spelling of 125561567 in words is "one hundred twenty-five million, five hundred sixty-one thousand, five hundred sixty-seven".