1509841 has 2 divisors, whose sum is σ = 1509842. Its totient is φ = 1509840.

The previous prime is 1509779. The next prime is 1509857. The reversal of 1509841 is 1489051.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1500625 + 9216 = 1225^2 + 96^2 .

It is an emirp because it is prime and its reverse (1489051) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1509841 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1509941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 754920 + 754921.

It is an arithmetic number, because the mean of its divisors is an integer number (754921).

2^1509841 is an apocalyptic number.

It is an amenable number.

1509841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1509841 is an equidigital number, since it uses as much as digits as its factorization.

1509841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1509841 is about 1228.7558748588. The cubic root of 1509841 is about 114.7212150702.

The spelling of 1509841 in words is "one million, five hundred nine thousand, eight hundred forty-one".