126525121 has 2 divisors, whose sum is σ = 126525122. Its totient is φ = 126525120.

The previous prime is 126525109. The next prime is 126525143. The reversal of 126525121 is 121525621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121859521 + 4665600 = 11039^2 + 2160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126525121 is a prime.

It is not a weakly prime, because it can be changed into another prime (126528121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63262560 + 63262561.

It is an arithmetic number, because the mean of its divisors is an integer number (63262561).

Almost surely, 2^126525121 is an apocalyptic number.

It is an amenable number.

126525121 is a deficient number, since it is larger than the sum of its proper divisors (1).

126525121 is an equidigital number, since it uses as much as digits as its factorization.

126525121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 25.

The square root of 126525121 is about 11248.3385884316. The cubic root of 126525121 is about 502.0252800716.

The spelling of 126525121 in words is "one hundred twenty-six million, five hundred twenty-five thousand, one hundred twenty-one".