5405621 has 16 divisors (see below), whose sum is σ = 6168960. Its totient is φ = 4699200.

The previous prime is 5405599. The next prime is 5405641. The reversal of 5405621 is 1265045.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5405621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon 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, 30110 + ... + 30288.

It is an arithmetic number, because the mean of its divisors is an integer number (385560).

Almost surely, 2^5405621 is an apocalyptic number.

It is an amenable number.

5405621 is a deficient number, since it is larger than the sum of its proper divisors (763339).

5405621 is a wasteful number, since it uses less digits than its factorization.

5405621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 5405621 is about 2324.9991397848. Note that the first 3 decimals coincide. The cubic root of 5405621 is about 175.5019169007.

The spelling of 5405621 in words is "five million, four hundred five thousand, six hundred twenty-one".