126747771 has 4 divisors (see below), whose sum is σ = 168997032. Its totient is φ = 84498512.

The previous prime is 126747763. The next prime is 126747781. The reversal of 126747771 is 177747621.

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

It is a cyclic number.

It is not a de Polignac number, because 126747771 - 2³ = 126747763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126747781) 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, 21124626 + ... + 21124631.

It is an arithmetic number, because the mean of its divisors is an integer number (42249258).

Almost surely, 2^126747771 is an apocalyptic number.

126747771 is a deficient number, since it is larger than the sum of its proper divisors (42249261).

126747771 is an equidigital number, since it uses as much as digits as its factorization.

126747771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42249260.

The product of its digits is 115248, while the sum is 42.

The square root of 126747771 is about 11258.2312553971. The cubic root of 126747771 is about 502.3195837551.

The spelling of 126747771 in words is "one hundred twenty-six million, seven hundred forty-seven thousand, seven hundred seventy-one".