691260 has 48 divisors (see below), whose sum is σ = 1989792. Its totient is φ = 179200.

The previous prime is 691241. The next prime is 691267. The reversal of 691260 is 62196.

It is a self number, because there is not a number n which added to its sum of digits gives 691260.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691267) by changing a digit.

691260 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2320 + ... + 2600.

It is an arithmetic number, because the mean of its divisors is an integer number (41454).

2⁶⁹¹²⁶⁰ is an apocalyptic number.

691260 is a gapful number since it is divisible by the number (60) 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 691260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (994896).

691260 is an abundant number, since it is smaller than the sum of its proper divisors (1298532).

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

691260 is a wasteful number, since it uses less digits than its factorization.

691260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 691260 is about 831.4204712418. The cubic root of 691260 is about 88.4193142486.

The spelling of 691260 in words is "six hundred ninety-one thousand, two hundred sixty".