742024009 has 4 divisors (see below), whose sum is σ = 756024516. Its totient is φ = 728023504.

The previous prime is 742024001. The next prime is 742024033. The reversal of 742024009 is 900420247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900420247 = 131 ⋅6873437.

It can be written as a sum of positive squares in 2 ways, for example, as 547700409 + 194323600 = 23403^2 + 13940^2 .

It is a cyclic number.

It is not a de Polignac number, because 742024009 - 2³ = 742024001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742024001) 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, 7000174 + ... + 7000279.

It is an arithmetic number, because the mean of its divisors is an integer number (189006129).

Almost surely, 2^742024009 is an apocalyptic number.

It is an amenable number.

742024009 is a deficient number, since it is larger than the sum of its proper divisors (14000507).

742024009 is a wasteful number, since it uses less digits than its factorization.

742024009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14000506.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 742024009 is about 27240.1176392467. The cubic root of 742024009 is about 905.3280696560.

The spelling of 742024009 in words is "seven hundred forty-two million, twenty-four thousand, nine".