1561159 has 2 divisors, whose sum is σ = 1561160. Its totient is φ = 1561158.

The previous prime is 1561151. The next prime is 1561163. The reversal of 1561159 is 9511651.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1561159 - 2³ = 1561151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1561151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780579 + 780580.

It is an arithmetic number, because the mean of its divisors is an integer number (780580).

2^1561159 is an apocalyptic number.

1561159 is a deficient number, since it is larger than the sum of its proper divisors (1).

1561159 is an equidigital number, since it uses as much as digits as its factorization.

1561159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350, while the sum is 28.

The square root of 1561159 is about 1249.4634848606. The cubic root of 1561159 is about 116.0065146956.

The spelling of 1561159 in words is "one million, five hundred sixty-one thousand, one hundred fifty-nine".