126660245 has 4 divisors (see below), whose sum is σ = 151992300. Its totient is φ = 101328192.

The previous prime is 126660239. The next prime is 126660257. The reversal of 126660245 is 542066621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 542066621 = 1223 ⋅443227.

It can be written as a sum of positive squares in 2 ways, for example, as 99181681 + 27478564 = 9959^2 + 5242^2 .

It is a cyclic number.

It is not a de Polignac number, because 126660245 - 2⁴ = 126660229 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12666020 + ... + 12666029.

It is an arithmetic number, because the mean of its divisors is an integer number (37998075).

Almost surely, 2^126660245 is an apocalyptic number.

It is an amenable number.

126660245 is a deficient number, since it is larger than the sum of its proper divisors (25332055).

126660245 is an equidigital number, since it uses as much as digits as its factorization.

126660245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25332054.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 126660245 is about 11254.3433837785. The cubic root of 126660245 is about 502.2039311018.

The spelling of 126660245 in words is "one hundred twenty-six million, six hundred sixty thousand, two hundred forty-five".