126243973 has 4 divisors (see below), whose sum is σ = 126477868. Its totient is φ = 126010080.

The previous prime is 126243967. The next prime is 126243977. The reversal of 126243973 is 379342621.

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 101263969 + 24980004 = 10063^2 + 4998^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126243973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126243977) 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, 116136 + ... + 117217.

It is an arithmetic number, because the mean of its divisors is an integer number (31619467).

Almost surely, 2^126243973 is an apocalyptic number.

It is an amenable number.

126243973 is a deficient number, since it is larger than the sum of its proper divisors (233895).

126243973 is an equidigital number, since it uses as much as digits as its factorization.

126243973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233894.

The product of its digits is 54432, while the sum is 37.

The square root of 126243973 is about 11235.8343259413. The cubic root of 126243973 is about 501.6531587748.

The spelling of 126243973 in words is "one hundred twenty-six million, two hundred forty-three thousand, nine hundred seventy-three".