1508561 has 2 divisors, whose sum is σ = 1508562. Its totient is φ = 1508560.

The previous prime is 1508531. The next prime is 1508579. The reversal of 1508561 is 1658051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1336336 + 172225 = 1156^2 + 415^2 .

It is an emirp because it is prime and its reverse (1658051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1508561 - 2¹⁴ = 1492177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1508561.

It is not a weakly prime, because it can be changed into another prime (1508531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 754280 + 754281.

It is an arithmetic number, because the mean of its divisors is an integer number (754281).

2^1508561 is an apocalyptic number.

It is an amenable number.

1508561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1508561 is an equidigital number, since it uses as much as digits as its factorization.

1508561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 1508561 is about 1228.2349123844. The cubic root of 1508561 is about 114.6887867833.

The spelling of 1508561 in words is "one million, five hundred eight thousand, five hundred sixty-one".