291078242 has 16 divisors (see below), whose sum is σ = 537375552. Its totient is φ = 115151760.

The previous prime is 291078187. The next prime is 291078247. The reversal of 291078242 is 242870192.

It is not an unprimeable number, because it can be changed into a prime (291078247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 799484 + ... + 799847.

It is an arithmetic number, because the mean of its divisors is an integer number (33585972).

Almost surely, 2^291078242 is an apocalyptic number.

291078242 is a deficient number, since it is larger than the sum of its proper divisors (246297310).

291078242 is a wasteful number, since it uses less digits than its factorization.

291078242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599353.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 291078242 is about 17061.0152687347. The cubic root of 291078242 is about 662.7299247982.

The spelling of 291078242 in words is "two hundred ninety-one million, seventy-eight thousand, two hundred forty-two".