801748642 has 4 divisors (see below), whose sum is σ = 1202622966. Its totient is φ = 400874320.

The previous prime is 801748639. The next prime is 801748669. The reversal of 801748642 is 246847108.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 749171641 + 52577001 = 27371^2 + 7251^2 .

It is a junction number, because it is equal to n+sod(n) for n = 801748595 and 801748604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200437159 + ... + 200437162.

Almost surely, 2^801748642 is an apocalyptic number.

801748642 is a deficient number, since it is larger than the sum of its proper divisors (400874324).

801748642 is a wasteful number, since it uses less digits than its factorization.

801748642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400874323.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 801748642 is about 28315.1662894640. The cubic root of 801748642 is about 928.9936476125.

The spelling of 801748642 in words is "eight hundred one million, seven hundred forty-eight thousand, six hundred forty-two".