5661504 has 42 divisors (see below), whose sum is σ = 16229330. Its totient is φ = 1886976.

The previous prime is 5661503. The next prime is 5661517. The reversal of 5661504 is 4051665.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5531904 + 129600 = 2352^2 + 360^2 .

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4339 + ... + 5490.

Almost surely, 2^5661504 is an apocalyptic number.

It is an amenable number.

5661504 is an abundant number, since it is smaller than the sum of its proper divisors (10567826).

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

5661504 is a wasteful number, since it uses less digits than its factorization.

5661504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9847 (or 9834 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 5661504 is about 2379.3915188552. The cubic root of 5661504 is about 178.2285495794.

The spelling of 5661504 in words is "five million, six hundred sixty-one thousand, five hundred four".