125566871 has 2 divisors, whose sum is σ = 125566872. Its totient is φ = 125566870.

The previous prime is 125566757. The next prime is 125566907. The reversal of 125566871 is 178665521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125566871 - 2¹⁸ = 125304727 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125563871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62783435 + 62783436.

It is an arithmetic number, because the mean of its divisors is an integer number (62783436).

Almost surely, 2^125566871 is an apocalyptic number.

125566871 is a deficient number, since it is larger than the sum of its proper divisors (1).

125566871 is an equidigital number, since it uses as much as digits as its factorization.

125566871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 41.

The square root of 125566871 is about 11205.6624525282. The cubic root of 125566871 is about 500.7546883180.

The spelling of 125566871 in words is "one hundred twenty-five million, five hundred sixty-six thousand, eight hundred seventy-one".