801521242 has 4 divisors (see below), whose sum is σ = 1202281866. Its totient is φ = 400760620.

The previous prime is 801521233. The next prime is 801521249. The reversal of 801521242 is 242125108.

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., 585107721 + 216413521 = 24189^2 + 14711^2 .

It is not an unprimeable number, because it can be changed into a prime (801521249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200380309 + ... + 200380312.

Almost surely, 2^801521242 is an apocalyptic number.

801521242 is a deficient number, since it is larger than the sum of its proper divisors (400760624).

801521242 is a wasteful number, since it uses less digits than its factorization.

801521242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400760623.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 801521242 is about 28311.1504888092. The cubic root of 801521242 is about 928.9058091388.

The spelling of 801521242 in words is "eight hundred one million, five hundred twenty-one thousand, two hundred forty-two".