126780065 has 16 divisors (see below), whose sum is σ = 160446720. Its totient is φ = 95904000.

The previous prime is 126780061. The next prime is 126780091. The reversal of 126780065 is 560087621.

It is not a de Polignac number, because 126780065 - 2² = 126780061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126780061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70457 + ... + 72233.

It is an arithmetic number, because the mean of its divisors is an integer number (10027920).

Almost surely, 2^126780065 is an apocalyptic number.

It is an amenable number.

126780065 is a deficient number, since it is larger than the sum of its proper divisors (33666655).

126780065 is a wasteful number, since it uses less digits than its factorization.

126780065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 126780065 is about 11259.6654035544. The cubic root of 126780065 is about 502.3622420493.

The spelling of 126780065 in words is "one hundred twenty-six million, seven hundred eighty thousand, sixty-five".