125000521 has 2 divisors, whose sum is σ = 125000522. Its totient is φ = 125000520.

The previous prime is 125000509. The next prime is 125000531.

125000521 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124010496 + 990025 = 11136^2 + 995^2 .

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125000521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125000495 and 125000504.

It is not a weakly prime, because it can be changed into another prime (125000531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62500260 + 62500261.

It is an arithmetic number, because the mean of its divisors is an integer number (62500261).

Almost surely, 2^125000521 is an apocalyptic number.

It is an amenable number.

125000521 is a deficient number, since it is larger than the sum of its proper divisors (1).

125000521 is an equidigital number, since it uses as much as digits as its factorization.

125000521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 125000521 is about 11180.3631873030. The cubic root of 125000521 is about 500.0006946657. Note that the first 3 decimals are identical.

It can be divided in two parts, 125000 and 521, that added together give a palindrome (125521).

The spelling of 125000521 in words is "one hundred twenty-five million, five hundred twenty-one", and thus it is an aban number.