691041 has 24 divisors (see below), whose sum is σ = 1054080. Its totient is φ = 401856.

The previous prime is 691037. The next prime is 691051. The reversal of 691041 is 140196.

It is not a de Polignac number, because 691041 - 2² = 691037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 690999 and 691017.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 691041.

It is not an unprimeable number, because it can be changed into a prime (691001) 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, 14680 + ... + 14726.

It is an arithmetic number, because the mean of its divisors is an integer number (43920).

2⁶⁹¹⁰⁴¹ is an apocalyptic number.

It is an amenable number.

691041 is a deficient number, since it is larger than the sum of its proper divisors (363039).

691041 is a wasteful number, since it uses less digits than its factorization.

691041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 691041 is about 831.2887584949. The cubic root of 691041 is about 88.4099758062.

The spelling of 691041 in words is "six hundred ninety-one thousand, forty-one".