1265320 has 32 divisors (see below), whose sum is σ = 3254400. Its totient is φ = 433728.

The previous prime is 1265311. The next prime is 1265321. The reversal of 1265320 is 235621.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1265321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1980 + ... + 2539.

It is an arithmetic number, because the mean of its divisors is an integer number (101700).

2^1265320 is an apocalyptic number.

1265320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265320 is an abundant number, since it is smaller than the sum of its proper divisors (1989080).

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

1265320 is a wasteful number, since it uses less digits than its factorization.

1265320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4537 (or 4533 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1265320 is about 1124.8644362767. The cubic root of 1265320 is about 108.1600279665.

The spelling of 1265320 in words is "one million, two hundred sixty-five thousand, three hundred twenty".