1604665742 has 8 divisors (see below), whose sum is σ = 2407306176. Its totient is φ = 802230352.

The previous prime is 1604665723. The next prime is 1604665747. The reversal of 1604665742 is 2475664061.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1604665742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604665747) 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, 29918 + ... + 64065.

It is an arithmetic number, because the mean of its divisors is an integer number (300913272).

Almost surely, 2^1604665742 is an apocalyptic number.

1604665742 is a deficient number, since it is larger than the sum of its proper divisors (802640434).

1604665742 is an equidigital number, since it uses as much as digits as its factorization.

1604665742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102522.

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 1604665742 is about 40058.2793190122. The cubic root of 1604665742 is about 1170.7428846761.

The spelling of 1604665742 in words is "one billion, six hundred four million, six hundred sixty-five thousand, seven hundred forty-two".