691248 has 20 divisors (see below), whose sum is σ = 1785848. Its totient is φ = 230400.

The previous prime is 691241. The next prime is 691267. The reversal of 691248 is 842196.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 691248.

It is not an unprimeable number, because it can be changed into a prime (691241) by changing a digit.

691248 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7153 + ... + 7248.

2⁶⁹¹²⁴⁸ is an apocalyptic number.

It is an amenable number.

691248 is an abundant number, since it is smaller than the sum of its proper divisors (1094600).

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

691248 is a wasteful number, since it uses less digits than its factorization.

691248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14412 (or 14406 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 691248 is about 831.4132546454. The cubic root of 691248 is about 88.4188026042.

It can be divided in two parts, 6912 and 48, that multiplied together give a 4-th power (331776 = 24⁴).

The spelling of 691248 in words is "six hundred ninety-one thousand, two hundred forty-eight".