1265940 has 72 divisors (see below), whose sum is σ = 4143048. Its totient is φ = 311040.

The previous prime is 1265923. The next prime is 1265941. The reversal of 1265940 is 495621.

1265940 is a `hidden beast` number, since 1 + 2 + 659 + 4 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7056 + 1258884 = 84^2 + 1122^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2070 + ... + 2610.

2^1265940 is an apocalyptic number.

1265940 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 1265940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2071524).

1265940 is an abundant number, since it is smaller than the sum of its proper divisors (2877108).

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

1265940 is a wasteful number, since it uses less digits than its factorization.

1265940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1265940 is about 1125.1399912900. The cubic root of 1265940 is about 108.1776910260.

The spelling of 1265940 in words is "one million, two hundred sixty-five thousand, nine hundred forty".