1265780 has 24 divisors (see below), whose sum is σ = 2798880. Its totient is φ = 479520.

The previous prime is 1265779. The next prime is 1265801. The reversal of 1265780 is 875621.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1286 + ... + 2045.

It is an arithmetic number, because the mean of its divisors is an integer number (116620).

2^1265780 is an apocalyptic number.

1265780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265780 is an abundant number, since it is smaller than the sum of its proper divisors (1533100).

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

1265780 is a wasteful number, since it uses less digits than its factorization.

1265780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359 (or 3357 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1265780 is about 1125.0688867798. The cubic root of 1265780 is about 108.1731333693.

The spelling of 1265780 in words is "one million, two hundred sixty-five thousand, seven hundred eighty".