125524561 has 4 divisors (see below), whose sum is σ = 125715124. Its totient is φ = 125334000.

The previous prime is 125524543. The next prime is 125524579. The reversal of 125524561 is 165425521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165425521 = 17 ⋅9730913.

It is an interprime number because it is at equal distance from previous prime (125524543) and next prime (125524579).

It can be written as a sum of positive squares in 2 ways, for example, as 114896961 + 10627600 = 10719^2 + 3260^2 .

It is a cyclic number.

It is not a de Polignac number, because 125524561 - 2¹⁹ = 125000273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125524591) 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, 94290 + ... + 95611.

It is an arithmetic number, because the mean of its divisors is an integer number (31428781).

Almost surely, 2^125524561 is an apocalyptic number.

It is an amenable number.

125524561 is a deficient number, since it is larger than the sum of its proper divisors (190563).

125524561 is an equidigital number, since it uses as much as digits as its factorization.

125524561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190562.

The product of its digits is 12000, while the sum is 31.

The square root of 125524561 is about 11203.7744086535. The cubic root of 125524561 is about 500.6984385795.

The spelling of 125524561 in words is "one hundred twenty-five million, five hundred twenty-four thousand, five hundred sixty-one".