5621649 has 8 divisors (see below), whose sum is σ = 8176992. Its totient is φ = 3407040.

The previous prime is 5621617. The next prime is 5621653. The reversal of 5621649 is 9461265.

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

It is not a de Polignac number, because 5621649 - 2⁵ = 5621617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 170353 = 5621649 / (5 + 6 + 2 + 1 + 6 + 4 + 9).

It is a Curzon number.

5621649 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5621249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85144 + ... + 85209.

It is an arithmetic number, because the mean of its divisors is an integer number (1022124).

Almost surely, 2^5621649 is an apocalyptic number.

It is an amenable number.

5621649 is a deficient number, since it is larger than the sum of its proper divisors (2555343).

5621649 is a wasteful number, since it uses less digits than its factorization.

5621649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170367.

The product of its digits is 12960, while the sum is 33.

The square root of 5621649 is about 2371.0016870513. The cubic root of 5621649 is about 177.8093422108.

It can be divided in two parts, 56216 and 49, that added together give a palindrome (56265).

The spelling of 5621649 in words is "five million, six hundred twenty-one thousand, six hundred forty-nine".