742442421 has 32 divisors (see below), whose sum is σ = 1143797760. Its totient is φ = 419610816.

The previous prime is 742442399. The next prime is 742442447. The reversal of 742442421 is 124244247.

It is not a de Polignac number, because 742442421 - 2⁶ = 742442357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742442321) 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 31 ways as a sum of consecutive naturals, for example, 942990 + ... + 943776.

It is an arithmetic number, because the mean of its divisors is an integer number (35743680).

Almost surely, 2^742442421 is an apocalyptic number.

It is an amenable number.

742442421 is a deficient number, since it is larger than the sum of its proper divisors (401355339).

742442421 is a wasteful number, since it uses less digits than its factorization.

742442421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233.

The product of its digits is 14336, while the sum is 30.

The square root of 742442421 is about 27247.7966265164. The cubic root of 742442421 is about 905.4982029432.

Adding to 742442421 its reverse (124244247), we get a palindrome (866686668).

The spelling of 742442421 in words is "seven hundred forty-two million, four hundred forty-two thousand, four hundred twenty-one".