5635721 has 16 divisors (see below), whose sum is σ = 7346304. Its totient is φ = 4195584.

The previous prime is 5635717. The next prime is 5635727. The reversal of 5635721 is 1275365.

It is a cyclic number.

It is not a de Polignac number, because 5635721 - 2² = 5635717 is a prime.

It is a super-2 number, since 2×5635721² = 63522702379682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5635727) 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, 275 + ... + 3368.

It is an arithmetic number, because the mean of its divisors is an integer number (459144).

Almost surely, 2^5635721 is an apocalyptic number.

It is an amenable number.

5635721 is a deficient number, since it is larger than the sum of its proper divisors (1710583).

5635721 is a wasteful number, since it uses less digits than its factorization.

5635721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3680.

The product of its digits is 6300, while the sum is 29.

The square root of 5635721 is about 2373.9673544512. The cubic root of 5635721 is about 177.9575815263.

It can be divided in two parts, 56 and 35721, that multiplied together give a cube (2000376 = 126³).

The spelling of 5635721 in words is "five million, six hundred thirty-five thousand, seven hundred twenty-one".