126157723 has 4 divisors (see below), whose sum is σ = 126358288. Its totient is φ = 125957160.

The previous prime is 126157709. The next prime is 126157727. The reversal of 126157723 is 327751621.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126157723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126157727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99336 + ... + 100597.

It is an arithmetic number, because the mean of its divisors is an integer number (31589572).

Almost surely, 2^126157723 is an apocalyptic number.

126157723 is a deficient number, since it is larger than the sum of its proper divisors (200565).

126157723 is an equidigital number, since it uses as much as digits as its factorization.

126157723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200564.

The product of its digits is 17640, while the sum is 34.

The square root of 126157723 is about 11231.9955039165. The cubic root of 126157723 is about 501.5388894461.

The spelling of 126157723 in words is "one hundred twenty-six million, one hundred fifty-seven thousand, seven hundred twenty-three".