740221121 has 4 divisors (see below), whose sum is σ = 772404672. Its totient is φ = 708037572.

The previous prime is 740221109. The next prime is 740221169. The reversal of 740221121 is 121122047.

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 740221121 - 2¹⁰ = 740220097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 740221093 and 740221102.

It is not an unprimeable number, because it can be changed into a prime (740221921) 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, 16091741 + ... + 16091786.

It is an arithmetic number, because the mean of its divisors is an integer number (193101168).

Almost surely, 2^740221121 is an apocalyptic number.

It is an amenable number.

740221121 is a deficient number, since it is larger than the sum of its proper divisors (32183551).

740221121 is a wasteful number, since it uses less digits than its factorization.

740221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32183550.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 740221121 is about 27207.0049987131. The cubic root of 740221121 is about 904.5942529612.

Adding to 740221121 its reverse (121122047), we get a palindrome (861343168).

The spelling of 740221121 in words is "seven hundred forty million, two hundred twenty-one thousand, one hundred twenty-one".