1266616 has 32 divisors (see below), whose sum is σ = 2696400. Its totient is φ = 552960.

The previous prime is 1266611. The next prime is 1266631. The reversal of 1266616 is 6166621.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1656 + ... + 2296.

2^1266616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1266616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1348200).

1266616 is an abundant number, since it is smaller than the sum of its proper divisors (1429784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1266616 is a wasteful number, since it uses less digits than its factorization.

1266616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 675 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 1266616 is about 1125.4403582598. The cubic root of 1266616 is about 108.1969428879.

The spelling of 1266616 in words is "one million, two hundred sixty-six thousand, six hundred sixteen".