1560989 has 4 divisors (see below), whose sum is σ = 1575420. Its totient is φ = 1546560.

The previous prime is 1560973. The next prime is 1560997. The reversal of 1560989 is 9890651.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 422500 + 1138489 = 650^2 + 1067^2 .

It is a cyclic number.

It is not a de Polignac number, because 1560989 - 2⁴ = 1560973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1560289) 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 in 3 ways as a sum of consecutive naturals, for example, 7052 + ... + 7269.

It is an arithmetic number, because the mean of its divisors is an integer number (393855).

2^1560989 is an apocalyptic number.

It is an amenable number.

1560989 is a deficient number, since it is larger than the sum of its proper divisors (14431).

1560989 is a wasteful number, since it uses less digits than its factorization.

1560989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14430.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 1560989 is about 1249.3954538096. The cubic root of 1560989 is about 116.0023037592.

The spelling of 1560989 in words is "one million, five hundred sixty thousand, nine hundred eighty-nine".