740611021 has 4 divisors (see below), whose sum is σ = 740670112. Its totient is φ = 740551932.

The previous prime is 740610947. The next prime is 740611031. The reversal of 740611021 is 120116047.

740611021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 120116047 = 1069 ⋅112363.

It is a cyclic number.

It is not a de Polignac number, because 740611021 - 2¹⁹ = 740086733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 740610983 and 740611001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740611031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2481 + ... + 38566.

It is an arithmetic number, because the mean of its divisors is an integer number (185167528).

Almost surely, 2^740611021 is an apocalyptic number.

It is an amenable number.

740611021 is a deficient number, since it is larger than the sum of its proper divisors (59091).

740611021 is a wasteful number, since it uses less digits than its factorization.

740611021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59090.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 740611021 is about 27214.1694894406. The cubic root of 740611021 is about 904.7530520824.

Adding to 740611021 its reverse (120116047), we get a palindrome (860727068).

The spelling of 740611021 in words is "seven hundred forty million, six hundred eleven thousand, twenty-one".