5921645 has 4 divisors (see below), whose sum is σ = 7105980. Its totient is φ = 4737312.

The previous prime is 5921639. The next prime is 5921677. The reversal of 5921645 is 5461295.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2869636 + 3052009 = 1694^2 + 1747^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5921645 is a prime.

It is a super-3 number, since 3×5921645³ (a number of 21 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592160 + ... + 592169.

It is an arithmetic number, because the mean of its divisors is an integer number (1776495).

Almost surely, 2^5921645 is an apocalyptic number.

It is an amenable number.

5921645 is a deficient number, since it is larger than the sum of its proper divisors (1184335).

5921645 is a wasteful number, since it uses less digits than its factorization.

5921645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184334.

The product of its digits is 10800, while the sum is 32.

The square root of 5921645 is about 2433.4430340569. The cubic root of 5921645 is about 180.9175881145.

The spelling of 5921645 in words is "five million, nine hundred twenty-one thousand, six hundred forty-five".