5661445 has 8 divisors (see below), whose sum is σ = 6806520. Its totient is φ = 4520640.

The previous prime is 5661421. The next prime is 5661451. The reversal of 5661445 is 5441665.

It can be written as a sum of positive squares in 4 ways, for example, as 6561 + 5654884 = 81^2 + 2378^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5661445 - 2⁷ = 5661317 is a prime.

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, 4551 + ... + 5659.

It is an arithmetic number, because the mean of its divisors is an integer number (850815).

Almost surely, 2^5661445 is an apocalyptic number.

It is an amenable number.

5661445 is a deficient number, since it is larger than the sum of its proper divisors (1145075).

5661445 is a wasteful number, since it uses less digits than its factorization.

5661445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135.

The product of its digits is 14400, while the sum is 31.

The square root of 5661445 is about 2379.3791206951. The cubic root of 5661445 is about 178.2279304553.

The spelling of 5661445 in words is "five million, six hundred sixty-one thousand, four hundred forty-five".