1561164 has 24 divisors (see below), whose sum is σ = 3974208. Its totient is φ = 473040.

The previous prime is 1561163. The next prime is 1561169. The reversal of 1561164 is 4611651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5782 + ... + 6045.

It is an arithmetic number, because the mean of its divisors is an integer number (165592).

2^1561164 is an apocalyptic number.

It is an amenable number.

1561164 is an abundant number, since it is smaller than the sum of its proper divisors (2413044).

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

1561164 is a wasteful number, since it uses less digits than its factorization.

1561164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11845 (or 11843 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 1561164 is about 1249.4654857178. The cubic root of 1561164 is about 116.0066385420.

It can be divided in two parts, 1 and 561164, that added together give a palindrome (561165).

The spelling of 1561164 in words is "one million, five hundred sixty-one thousand, one hundred sixty-four".