125281 has 8 divisors (see below), whose sum is σ = 141120. Its totient is φ = 110352.

The previous prime is 125269. The next prime is 125287. The reversal of 125281 is 182521.

It is the 145-th star number.

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

It is a cyclic number.

It is not a de Polignac number, because 125281 - 2⁹ = 124769 is a prime.

It is a super-2 number, since 2×125281² = 31390657922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125287) 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, 90 + ... + 508.

It is an arithmetic number, because the mean of its divisors is an integer number (17640).

2¹²⁵²⁸¹ is an apocalyptic number.

It is an amenable number.

125281 is a deficient number, since it is larger than the sum of its proper divisors (15839).

125281 is a wasteful number, since it uses less digits than its factorization.

125281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455.

The product of its digits is 160, while the sum is 19.

The square root of 125281 is about 353.9505615195. The cubic root of 125281 is about 50.0374386267.

It can be divided in two parts, 125 and 281, that added together give a triangular number (406 = T₂₈).

The spelling of 125281 in words is "one hundred twenty-five thousand, two hundred eighty-one".