915641 has 2 divisors, whose sum is σ = 915642. Its totient is φ = 915640.

The previous prime is 915631. The next prime is 915659. The reversal of 915641 is 146519.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 883600 + 32041 = 940^2 + 179^2 .

It is an emirp because it is prime and its reverse (146519) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-915641 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 915641.

It is not a weakly prime, because it can be changed into another prime (915601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457820 + 457821.

It is an arithmetic number, because the mean of its divisors is an integer number (457821).

2⁹¹⁵⁶⁴¹ is an apocalyptic number.

It is an amenable number.

915641 is a deficient number, since it is larger than the sum of its proper divisors (1).

915641 is an equidigital number, since it uses as much as digits as its factorization.

915641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 915641 is about 956.8913208928. The cubic root of 915641 is about 97.1050337798.

The spelling of 915641 in words is "nine hundred fifteen thousand, six hundred forty-one".