125569 has 4 divisors (see below), whose sum is σ = 126400. Its totient is φ = 124740.

The previous prime is 125551. The next prime is 125591. The reversal of 125569 is 965521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 965521 = 47 ⋅20543.

It is a cyclic number.

It is not a de Polignac number, because 125569 - 2⁷ = 125441 is a prime.

It is a super-2 number, since 2×125569² = 31535147522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (125509) 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, 117 + ... + 514.

It is an arithmetic number, because the mean of its divisors is an integer number (31600).

2¹²⁵⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

125569 is a deficient number, since it is larger than the sum of its proper divisors (831).

125569 is an equidigital number, since it uses as much as digits as its factorization.

125569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830.

The product of its digits is 2700, while the sum is 28.

The square root of 125569 is about 354.3571644542. The cubic root of 125569 is about 50.0757518419.

The spelling of 125569 in words is "one hundred twenty-five thousand, five hundred sixty-nine".