740221 has 4 divisors (see below), whose sum is σ = 779200. Its totient is φ = 701244.

The previous prime is 740191. The next prime is 740227. The reversal of 740221 is 122047.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 740221 - 2⁵ = 740189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 740195 and 740204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19461 + ... + 19498.

It is an arithmetic number, because the mean of its divisors is an integer number (194800).

2⁷⁴⁰²²¹ is an apocalyptic number.

It is an amenable number.

740221 is a deficient number, since it is larger than the sum of its proper divisors (38979).

740221 is a wasteful number, since it uses less digits than its factorization.

740221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38978.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 740221 is about 860.3609707559. The cubic root of 740221 is about 90.4594203671.

Adding to 740221 its reverse (122047), we get a palindrome (862268).

It can be divided in two parts, 740 and 221, that added together give a square (961 = 31²).

The spelling of 740221 in words is "seven hundred forty thousand, two hundred twenty-one", and thus it is an iban number.