125571 has 8 divisors (see below), whose sum is σ = 176320. Its totient is φ = 79272.

The previous prime is 125551. The next prime is 125591. The reversal of 125571 is 175521.

It is an interprime number because it is at equal distance from previous prime (125551) and next prime (125591).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125571 - 2⁵ = 125539 is a prime.

125571 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (125551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1045 + ... + 1158.

It is an arithmetic number, because the mean of its divisors is an integer number (22040).

2¹²⁵⁵⁷¹ is an apocalyptic number.

125571 is a deficient number, since it is larger than the sum of its proper divisors (50749).

125571 is a wasteful number, since it uses less digits than its factorization.

125571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225.

The product of its digits is 350, while the sum is 21.

The square root of 125571 is about 354.3599864545. The cubic root of 125571 is about 50.0760177009.

It can be divided in two parts, 1255 and 71, that added together give a triangular number (1326 = T₅₁).

The spelling of 125571 in words is "one hundred twenty-five thousand, five hundred seventy-one".