802664042 has 4 divisors (see below), whose sum is σ = 1203996066. Its totient is φ = 401332020.

The previous prime is 802664041. The next prime is 802664081. The reversal of 802664042 is 240466208.

It is a happy number.

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., 489338641 + 313325401 = 22121^2 + 17701^2 .

It is not an unprimeable number, because it can be changed into a prime (802664041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200666009 + ... + 200666012.

Almost surely, 2^802664042 is an apocalyptic number.

802664042 is a deficient number, since it is larger than the sum of its proper divisors (401332024).

802664042 is a wasteful number, since it uses less digits than its factorization.

802664042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401332023.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 802664042 is about 28331.3261602771. The cubic root of 802664042 is about 929.3470739842.

The spelling of 802664042 in words is "eight hundred two million, six hundred sixty-four thousand, forty-two".