742042227251 has 4 divisors (see below), whose sum is σ = 799122398592. Its totient is φ = 684962055912.

The previous prime is 742042227229. The next prime is 742042227301. The reversal of 742042227251 is 152722240247.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152722240247 = 17 ⋅8983661191.

It is a cyclic number.

It is not a de Polignac number, because 742042227251 - 2¹⁴ = 742042210867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742042220251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28540085651 + ... + 28540085676.

It is an arithmetic number, because the mean of its divisors is an integer number (199780599648).

Almost surely, 2^742042227251 is an apocalyptic number.

742042227251 is a deficient number, since it is larger than the sum of its proper divisors (57080171341).

742042227251 is a wasteful number, since it uses less digits than its factorization.

742042227251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57080171340.

The product of its (nonzero) digits is 125440, while the sum is 38.

Adding to 742042227251 its reverse (152722240247), we get a palindrome (894764467498).

The spelling of 742042227251 in words is "seven hundred forty-two billion, forty-two million, two hundred twenty-seven thousand, two hundred fifty-one".