126551017 has 4 divisors (see below), whose sum is σ = 126667476. Its totient is φ = 126434560.

The previous prime is 126551011. The next prime is 126551059. The reversal of 126551017 is 710155621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77774761 + 48776256 = 8819^2 + 6984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126551017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126551011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56584 + ... + 58777.

It is an arithmetic number, because the mean of its divisors is an integer number (31666869).

Almost surely, 2^126551017 is an apocalyptic number.

It is an amenable number.

126551017 is a deficient number, since it is larger than the sum of its proper divisors (116459).

126551017 is a wasteful number, since it uses less digits than its factorization.

126551017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116458.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 126551017 is about 11249.4896328678. The cubic root of 126551017 is about 502.0595277101.

The spelling of 126551017 in words is "one hundred twenty-six million, five hundred fifty-one thousand, seventeen".