2061564 has 24 divisors (see below), whose sum is σ = 4846800. Its totient is φ = 681984.

The previous prime is 2061551. The next prime is 2061583. The reversal of 2061564 is 4651602.

It is a super-2 number, since 2×2061564² = 8500092252192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1212 + ... + 2364.

It is an arithmetic number, because the mean of its divisors is an integer number (201950).

2^2061564 is an apocalyptic number.

It is an amenable number.

2061564 is an abundant number, since it is smaller than the sum of its proper divisors (2785236).

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

2061564 is a wasteful number, since it uses less digits than its factorization.

2061564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309 (or 1307 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2061564 is about 1435.8147512824. The cubic root of 2061564 is about 127.2718256584.

It can be divided in two parts, 206 and 1564, that added together give a triangular number (1770 = T₅₉).

The spelling of 2061564 in words is "two million, sixty-one thousand, five hundred sixty-four".