742954821 has 16 divisors (see below), whose sum is σ = 1142705664. Its totient is φ = 420576624.

The previous prime is 742954819. The next prime is 742954847. The reversal of 742954821 is 128459247.

It is not a de Polignac number, because 742954821 - 2¹ = 742954819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742954801) 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 15 ways as a sum of consecutive naturals, for example, 163075 + ... + 167568.

It is an arithmetic number, because the mean of its divisors is an integer number (71419104).

Almost surely, 2^742954821 is an apocalyptic number.

It is an amenable number.

742954821 is a deficient number, since it is larger than the sum of its proper divisors (399750843).

742954821 is a wasteful number, since it uses less digits than its factorization.

742954821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330760.

The product of its digits is 161280, while the sum is 42.

The square root of 742954821 is about 27257.1975999001. The cubic root of 742954821 is about 905.7064662681.

The spelling of 742954821 in words is "seven hundred forty-two million, nine hundred fifty-four thousand, eight hundred twenty-one".