1267780 has 12 divisors (see below), whose sum is σ = 2662380. Its totient is φ = 507104.

The previous prime is 1267771. The next prime is 1267787. The reversal of 1267780 is 877621.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 746496 + 521284 = 864^2 + 722^2 .

It is a super-2 number, since 2×1267780² = 3214532256800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1267787) 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, 31675 + ... + 31714.

It is an arithmetic number, because the mean of its divisors is an integer number (221865).

2^1267780 is an apocalyptic number.

1267780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1267780 is an abundant number, since it is smaller than the sum of its proper divisors (1394600).

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

1267780 is a wasteful number, since it uses less digits than its factorization.

1267780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63398 (or 63396 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 1267780 is about 1125.9573704186. The cubic root of 1267780 is about 108.2300764980.

The spelling of 1267780 in words is "one million, two hundred sixty-seven thousand, seven hundred eighty".