742240017 has 40 divisors (see below), whose sum is σ = 1146336576. Its totient is φ = 478247328.

The previous prime is 742239991. The next prime is 742240021. The reversal of 742240017 is 710042247.

It is a happy number.

It is not a de Polignac number, because 742240017 - 2⁷ = 742239889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (742240117) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 499758 + ... + 501240.

Almost surely, 2^742240017 is an apocalyptic number.

It is an amenable number.

742240017 is a deficient number, since it is larger than the sum of its proper divisors (404096559).

742240017 is a wasteful number, since it uses less digits than its factorization.

742240017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699 (or 1690 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 742240017 is about 27244.0822381669. The cubic root of 742240017 is about 905.4159100899.

The spelling of 742240017 in words is "seven hundred forty-two million, two hundred forty thousand, seventeen".