126723747 has 4 divisors (see below), whose sum is σ = 168965000. Its totient is φ = 84482496.

The previous prime is 126723683. The next prime is 126723757. The reversal of 126723747 is 747327621.

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

It is not a de Polignac number, because 126723747 - 2⁶ = 126723683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126723757) 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, 21120622 + ... + 21120627.

It is an arithmetic number, because the mean of its divisors is an integer number (42241250).

Almost surely, 2^126723747 is an apocalyptic number.

126723747 is a deficient number, since it is larger than the sum of its proper divisors (42241253).

126723747 is an equidigital number, since it uses as much as digits as its factorization.

126723747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42241252.

The product of its digits is 98784, while the sum is 39.

The square root of 126723747 is about 11257.1642521552. The cubic root of 126723747 is about 502.2878448980.

The spelling of 126723747 in words is "one hundred twenty-six million, seven hundred twenty-three thousand, seven hundred forty-seven".