1266427694 has 12 divisors (see below), whose sum is σ = 2171247192. Its totient is φ = 542697660.

The previous prime is 1266427693. The next prime is 1266427703. The reversal of 1266427694 is 4967246621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266427693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128399 + ... + 137909.

It is an arithmetic number, because the mean of its divisors is an integer number (180937266).

Almost surely, 2^1266427694 is an apocalyptic number.

1266427694 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1266427694 is a deficient number, since it is larger than the sum of its proper divisors (904819498).

1266427694 is an frugal number, since it uses more digits than its factorization.

1266427694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19031 (or 9520 counting only the distinct ones).

The product of its digits is 870912, while the sum is 47.

The square root of 1266427694 is about 35586.9034056070. The cubic root of 1266427694 is about 1081.9158079365.

The spelling of 1266427694 in words is "one billion, two hundred sixty-six million, four hundred twenty-seven thousand, six hundred ninety-four".