1961586 has 24 divisors (see below), whose sum is σ = 4636944. Its totient is φ = 594360.

The previous prime is 1961581. The next prime is 1961593. The reversal of 1961586 is 6851691.

1961586 is a `hidden beast` number, since 19 + 61 + 586 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1961586.

It is not an unprimeable number, because it can be changed into a prime (1961581) 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, 4756 + ... + 5151.

It is an arithmetic number, because the mean of its divisors is an integer number (193206).

2^1961586 is an apocalyptic number.

1961586 is an abundant number, since it is smaller than the sum of its proper divisors (2675358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1961586 is a wasteful number, since it uses less digits than its factorization.

1961586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9926 (or 9923 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1961586 is about 1400.5663140316. The cubic root of 1961586 is about 125.1802413130.

It can be divided in two parts, 19615 and 86, that added together give a triangular number (19701 = T₁₉₈).

The spelling of 1961586 in words is "one million, nine hundred sixty-one thousand, five hundred eighty-six".