742085705 has 4 divisors (see below), whose sum is σ = 890502852. Its totient is φ = 593668560.

The previous prime is 742085693. The next prime is 742085711. The reversal of 742085705 is 507580247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 507580247 = 101 ⋅5025547.

It can be written as a sum of positive squares in 2 ways, for example, as 88209664 + 653876041 = 9392^2 + 25571^2 .

It is not a de Polignac number, because 742085705 - 2²⁸ = 473650249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74208566 + ... + 74208575.

It is an arithmetic number, because the mean of its divisors is an integer number (222625713).

Almost surely, 2^742085705 is an apocalyptic number.

It is an amenable number.

742085705 is a deficient number, since it is larger than the sum of its proper divisors (148417147).

742085705 is a wasteful number, since it uses less digits than its factorization.

742085705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148417146.

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 742085705 is about 27241.2500630937. The cubic root of 742085705 is about 905.3531602964.

The spelling of 742085705 in words is "seven hundred forty-two million, eighty-five thousand, seven hundred five".