1266780 has 48 divisors (see below), whose sum is σ = 3636864. Its totient is φ = 329280.

The previous prime is 1266779. The next prime is 1266781. The reversal of 1266780 is 876621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1266779) and next prime (1266781).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266781) 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, 2335 + ... + 2825.

It is an arithmetic number, because the mean of its divisors is an integer number (75768).

2^1266780 is an apocalyptic number.

1266780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1266780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1818432).

1266780 is an abundant number, since it is smaller than the sum of its proper divisors (2370084).

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

1266780 is a wasteful number, since it uses less digits than its factorization.

1266780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 1266780 is about 1125.5132162707. The cubic root of 1266780 is about 108.2016124255.

The spelling of 1266780 in words is "one million, two hundred sixty-six thousand, seven hundred eighty".