125729887 has 4 divisors (see below), whose sum is σ = 126501400. Its totient is φ = 124958376.

The previous prime is 125729869. The next prime is 125729911. The reversal of 125729887 is 788927521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125729887 - 2⁷ = 125729759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125729887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125729827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385512 + ... + 385837.

It is an arithmetic number, because the mean of its divisors is an integer number (31625350).

Almost surely, 2^125729887 is an apocalyptic number.

125729887 is a deficient number, since it is larger than the sum of its proper divisors (771513).

125729887 is an equidigital number, since it uses as much as digits as its factorization.

125729887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771512.

The product of its digits is 564480, while the sum is 49.

The square root of 125729887 is about 11212.9339157956. The cubic root of 125729887 is about 500.9712946184.

The spelling of 125729887 in words is "one hundred twenty-five million, seven hundred twenty-nine thousand, eight hundred eighty-seven".