125511671 has 4 divisors (see below), whose sum is σ = 125707512. Its totient is φ = 125315832.

The previous prime is 125511643. The next prime is 125511691. The reversal of 125511671 is 176115521.

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 125511671 - 2¹⁴ = 125495287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125511611) 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, 96956 + ... + 98241.

It is an arithmetic number, because the mean of its divisors is an integer number (31426878).

Almost surely, 2^125511671 is an apocalyptic number.

125511671 is a deficient number, since it is larger than the sum of its proper divisors (195841).

125511671 is an equidigital number, since it uses as much as digits as its factorization.

125511671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195840.

The product of its digits is 2100, while the sum is 29.

The square root of 125511671 is about 11203.1991413167. The cubic root of 125511671 is about 500.6812992410.

The spelling of 125511671 in words is "one hundred twenty-five million, five hundred eleven thousand, six hundred seventy-one".