5405645 has 16 divisors (see below), whose sum is σ = 7596288. Its totient is φ = 3615360.

The previous prime is 5405641. The next prime is 5405669. The reversal of 5405645 is 5465045.

It is not a de Polignac number, because 5405645 - 2² = 5405641 is a prime.

It is a super-3 number, since 3×5405645³ (a number of 21 digits) contains 333 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5405641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449 + ... + 3318.

It is an arithmetic number, because the mean of its divisors is an integer number (474768).

Almost surely, 2^5405645 is an apocalyptic number.

It is an amenable number.

5405645 is a deficient number, since it is larger than the sum of its proper divisors (2190643).

5405645 is a wasteful number, since it uses less digits than its factorization.

5405645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3820.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 5405645 is about 2325.0043010713. The cubic root of 5405645 is about 175.5021766328.

The spelling of 5405645 in words is "five million, four hundred five thousand, six hundred forty-five".