126780427 has 4 divisors (see below), whose sum is σ = 127115320. Its totient is φ = 126445536.

The previous prime is 126780419. The next prime is 126780443. The reversal of 126780427 is 724087621.

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 126780427 - 2³ = 126780419 is a prime.

It is a super-3 number, since 3×126780427³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126780457) 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, 166878 + ... + 167635.

It is an arithmetic number, because the mean of its divisors is an integer number (31778830).

Almost surely, 2^126780427 is an apocalyptic number.

126780427 is a deficient number, since it is larger than the sum of its proper divisors (334893).

126780427 is an equidigital number, since it uses as much as digits as its factorization.

126780427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334892.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 126780427 is about 11259.6814786210. The cubic root of 126780427 is about 502.3627201870.

The spelling of 126780427 in words is "one hundred twenty-six million, seven hundred eighty thousand, four hundred twenty-seven".