1915841 has 2 divisors, whose sum is σ = 1915842. Its totient is φ = 1915840.

The previous prime is 1915817. The next prime is 1915843. The reversal of 1915841 is 1485191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1113025 + 802816 = 1055^2 + 896^2 .

It is an emirp because it is prime and its reverse (1485191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1915841 - 2⁶ = 1915777 is a prime.

Together with 1915843, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1915843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 957920 + 957921.

It is an arithmetic number, because the mean of its divisors is an integer number (957921).

2^1915841 is an apocalyptic number.

It is an amenable number.

1915841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1915841 is an equidigital number, since it uses as much as digits as its factorization.

1915841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 29.

The square root of 1915841 is about 1384.1390826069. The cubic root of 1915841 is about 124.1994924447.

The spelling of 1915841 in words is "one million, nine hundred fifteen thousand, eight hundred forty-one".