126660397 has 2 divisors, whose sum is σ = 126660398. Its totient is φ = 126660396.

The previous prime is 126660383. The next prime is 126660427. The reversal of 126660397 is 793066621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117744201 + 8916196 = 10851^2 + 2986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126660397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126660307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63330198 + 63330199.

It is an arithmetic number, because the mean of its divisors is an integer number (63330199).

Almost surely, 2^126660397 is an apocalyptic number.

It is an amenable number.

126660397 is a deficient number, since it is larger than the sum of its proper divisors (1).

126660397 is an equidigital number, since it uses as much as digits as its factorization.

126660397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 126660397 is about 11254.3501367249. The cubic root of 126660397 is about 502.2041319935.

The spelling of 126660397 in words is "one hundred twenty-six million, six hundred sixty thousand, three hundred ninety-seven".