805242542 has 16 divisors (see below), whose sum is σ = 1332504432. Its totient is φ = 362585280.

The previous prime is 805242539. The next prime is 805242569. The reversal of 805242542 is 245242508.

It is a junction number, because it is equal to n+sod(n) for n = 805242499 and 805242508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376628 + ... + 378759.

It is an arithmetic number, because the mean of its divisors is an integer number (83281527).

Almost surely, 2^805242542 is an apocalyptic number.

805242542 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

805242542 is a deficient number, since it is larger than the sum of its proper divisors (527261890).

805242542 is a wasteful number, since it uses less digits than its factorization.

805242542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755443.

The product of its (nonzero) digits is 25600, while the sum is 32.

The square root of 805242542 is about 28376.7958374444. The cubic root of 805242542 is about 930.3411636123.

The spelling of 805242542 in words is "eight hundred five million, two hundred forty-two thousand, five hundred forty-two".