742005647 has 16 divisors (see below), whose sum is σ = 801189792. Its totient is φ = 684625920.

The previous prime is 742005643. The next prime is 742005661. The reversal of 742005647 is 746500247.

It is a cyclic number.

It is not a de Polignac number, because 742005647 - 2² = 742005643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742005643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365048 + ... + 367074.

It is an arithmetic number, because the mean of its divisors is an integer number (50074362).

Almost surely, 2^742005647 is an apocalyptic number.

742005647 is a deficient number, since it is larger than the sum of its proper divisors (59184145).

742005647 is a wasteful number, since it uses less digits than its factorization.

742005647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458.

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 742005647 is about 27239.7805975011. The cubic root of 742005647 is about 905.3206018962.

The spelling of 742005647 in words is "seven hundred forty-two million, five thousand, six hundred forty-seven".