126551573 has 2 divisors, whose sum is σ = 126551574. Its totient is φ = 126551572.

The previous prime is 126551569. The next prime is 126551591. The reversal of 126551573 is 375155621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97574884 + 28976689 = 9878^2 + 5383^2 .

It is an emirp because it is prime and its reverse (375155621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126551573 - 2² = 126551569 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126551473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63275786 + 63275787.

It is an arithmetic number, because the mean of its divisors is an integer number (63275787).

Almost surely, 2^126551573 is an apocalyptic number.

It is an amenable number.

126551573 is a deficient number, since it is larger than the sum of its proper divisors (1).

126551573 is an equidigital number, since it uses as much as digits as its factorization.

126551573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31500, while the sum is 35.

The square root of 126551573 is about 11249.5143450729. The cubic root of 126551573 is about 502.0602629727.

The spelling of 126551573 in words is "one hundred twenty-six million, five hundred fifty-one thousand, five hundred seventy-three".