5621004 has 18 divisors (see below), whose sum is σ = 14208740. Its totient is φ = 1873656.

The previous prime is 5620997. The next prime is 5621023. The reversal of 5621004 is 4001265.

It is a happy number.

5621004 is a `hidden beast` number, since 562 + 100 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78034 + ... + 78105.

Almost surely, 2^5621004 is an apocalyptic number.

It is an amenable number.

5621004 is an abundant number, since it is smaller than the sum of its proper divisors (8587736).

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

5621004 is a wasteful number, since it uses less digits than its factorization.

5621004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156149 (or 156144 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 5621004 is about 2370.8656646887. The cubic root of 5621004 is about 177.8025416313.

Adding to 5621004 its reverse (4001265), we get a palindrome (9622269).

The spelling of 5621004 in words is "five million, six hundred twenty-one thousand, four".