125006891 has 4 divisors (see below), whose sum is σ = 127914072. Its totient is φ = 122099712.

The previous prime is 125006867. The next prime is 125006897. The reversal of 125006891 is 198600521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125006891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125006897) 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, 1453526 + ... + 1453611.

It is an arithmetic number, because the mean of its divisors is an integer number (31978518).

Almost surely, 2^125006891 is an apocalyptic number.

125006891 is a deficient number, since it is larger than the sum of its proper divisors (2907181).

125006891 is an equidigital number, since it uses as much as digits as its factorization.

125006891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2907180.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 125006891 is about 11180.6480581405. The cubic root of 125006891 is about 500.0091878312.

It can be divided in two parts, 12500 and 6891, that added together give a palindrome (19391).

The spelling of 125006891 in words is "one hundred twenty-five million, six thousand, eight hundred ninety-one".