126774551 has 4 divisors (see below), whose sum is σ = 132286512. Its totient is φ = 121262592.

The previous prime is 126774541. The next prime is 126774553. The reversal of 126774551 is 155477621.

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 126774551 - 2¹⁴ = 126758167 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 (126774553) 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, 2755946 + ... + 2755991.

It is an arithmetic number, because the mean of its divisors is an integer number (33071628).

Almost surely, 2^126774551 is an apocalyptic number.

126774551 is a deficient number, since it is larger than the sum of its proper divisors (5511961).

126774551 is an equidigital number, since it uses as much as digits as its factorization.

126774551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5511960.

The product of its digits is 58800, while the sum is 38.

The square root of 126774551 is about 11259.4205445929. The cubic root of 126774551 is about 502.3549589233.

The spelling of 126774551 in words is "one hundred twenty-six million, seven hundred seventy-four thousand, five hundred fifty-one".