781351242 has 16 divisors (see below), whose sum is σ = 1785945792. Its totient is φ = 223243200.

The previous prime is 781351223. The next prime is 781351267. The reversal of 781351242 is 242153187.

781351242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×781351242² = 1221019526749885128, which contains 22 as substring.

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, 9301759 + ... + 9301842.

It is an arithmetic number, because the mean of its divisors is an integer number (111621612).

Almost surely, 2^781351242 is an apocalyptic number.

781351242 is an abundant number, since it is smaller than the sum of its proper divisors (1004594550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

781351242 is a wasteful number, since it uses less digits than its factorization.

781351242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18603613.

The product of its digits is 13440, while the sum is 33.

The square root of 781351242 is about 27952.6607320305. The cubic root of 781351242 is about 921.0476573381.

The spelling of 781351242 in words is "seven hundred eighty-one million, three hundred fifty-one thousand, two hundred forty-two".