742858721 has 8 divisors (see below), whose sum is σ = 815832000. Its totient is φ = 670792240.

The previous prime is 742858709. The next prime is 742858733. The reversal of 742858721 is 127858247.

It is an interprime number because it is at equal distance from previous prime (742858709) and next prime (742858733).

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 742858721 - 2²² = 738664417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742858421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224981 + ... + 228258.

It is an arithmetic number, because the mean of its divisors is an integer number (101979000).

Almost surely, 2^742858721 is an apocalyptic number.

It is an amenable number.

742858721 is a deficient number, since it is larger than the sum of its proper divisors (72973279).

742858721 is a wasteful number, since it uses less digits than its factorization.

742858721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453399.

The product of its digits is 250880, while the sum is 44.

The square root of 742858721 is about 27255.4347057610. The cubic root of 742858721 is about 905.6674140305.

The spelling of 742858721 in words is "seven hundred forty-two million, eight hundred fifty-eight thousand, seven hundred twenty-one".