125143791 has 4 divisors (see below), whose sum is σ = 166858392. Its totient is φ = 83429192.

The previous prime is 125143769. The next prime is 125143793. The reversal of 125143791 is 197341521.

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 125143791 - 2⁶ = 125143727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125143793) 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, 20857296 + ... + 20857301.

It is an arithmetic number, because the mean of its divisors is an integer number (41714598).

Almost surely, 2^125143791 is an apocalyptic number.

125143791 is a deficient number, since it is larger than the sum of its proper divisors (41714601).

125143791 is an equidigital number, since it uses as much as digits as its factorization.

125143791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41714600.

The product of its digits is 7560, while the sum is 33.

The square root of 125143791 is about 11186.7685682685. The cubic root of 125143791 is about 500.1916478661.

It can be divided in two parts, 125 and 143791, that added together give a triangular number (143916 = T₅₃₆).

The spelling of 125143791 in words is "one hundred twenty-five million, one hundred forty-three thousand, seven hundred ninety-one".