1959561 has 12 divisors (see below), whose sum is σ = 2845440. Its totient is φ = 1299480.

The previous prime is 1959523. The next prime is 1959583. The reversal of 1959561 is 1659591.

1959561 is a `hidden beast` number, since 1 + 9 + 595 + 61 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1959561 is a prime.

1959561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1959521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1696 + ... + 2606.

It is an arithmetic number, because the mean of its divisors is an integer number (237120).

2^1959561 is an apocalyptic number.

It is an amenable number.

1959561 is a deficient number, since it is larger than the sum of its proper divisors (885879).

1959561 is a wasteful number, since it uses less digits than its factorization.

1959561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156 (or 1153 counting only the distinct ones).

The product of its digits is 12150, while the sum is 36.

The square root of 1959561 is about 1399.8432055055. The cubic root of 1959561 is about 125.1371507956.

The spelling of 1959561 in words is "one million, nine hundred fifty-nine thousand, five hundred sixty-one".