125523521 has 2 divisors, whose sum is σ = 125523522. Its totient is φ = 125523520.

The previous prime is 125523491. The next prime is 125523539. The reversal of 125523521 is 125325521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125440000 + 83521 = 11200^2 + 289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125523521 is a prime.

It is a super-3 number, since 3×125523521³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125522521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62761760 + 62761761.

It is an arithmetic number, because the mean of its divisors is an integer number (62761761).

Almost surely, 2^125523521 is an apocalyptic number.

It is an amenable number.

125523521 is a deficient number, since it is larger than the sum of its proper divisors (1).

125523521 is an equidigital number, since it uses as much as digits as its factorization.

125523521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000, while the sum is 26.

The square root of 125523521 is about 11203.7279956272. The cubic root of 125523521 is about 500.6970557749.

The spelling of 125523521 in words is "one hundred twenty-five million, five hundred twenty-three thousand, five hundred twenty-one".