125343521 has 2 divisors, whose sum is σ = 125343522. Its totient is φ = 125343520.

The previous prime is 125343511. The next prime is 125343557.

It is a happy number.

125343521 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118026496 + 7317025 = 10864^2 + 2705^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 125343521 - 2¹⁸ = 125081377 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (125343511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62671760 + 62671761.

It is an arithmetic number, because the mean of its divisors is an integer number (62671761).

Almost surely, 2^125343521 is an apocalyptic number.

It is an amenable number.

125343521 is a deficient number, since it is larger than the sum of its proper divisors (1).

125343521 is an equidigital number, since it uses as much as digits as its factorization.

125343521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 26.

The square root of 125343521 is about 11195.6920732932. The cubic root of 125343521 is about 500.4576090601.

The spelling of 125343521 in words is "one hundred twenty-five million, three hundred forty-three thousand, five hundred twenty-one".