742810321 has 8 divisors (see below), whose sum is σ = 838281600. Its totient is φ = 651996240.

The previous prime is 742810319. The next prime is 742810333. The reversal of 742810321 is 123018247.

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

It is a cyclic number.

It is not a de Polignac number, because 742810321 - 2¹ = 742810319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 742810321.

It is not an unprimeable number, because it can be changed into a prime (742810351) 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 7 ways as a sum of consecutive naturals, for example, 1163961 + ... + 1164598.

It is an arithmetic number, because the mean of its divisors is an integer number (104785200).

Almost surely, 2^742810321 is an apocalyptic number.

It is an amenable number.

742810321 is a deficient number, since it is larger than the sum of its proper divisors (95471279).

742810321 is a wasteful number, since it uses less digits than its factorization.

742810321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328599.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 742810321 is about 27254.5467949845. The cubic root of 742810321 is about 905.6477444067.

Adding to 742810321 its reverse (123018247), we get a palindrome (865828568).

The spelling of 742810321 in words is "seven hundred forty-two million, eight hundred ten thousand, three hundred twenty-one".