840813142 has 32 divisors (see below), whose sum is σ = 1412722080. Its totient is φ = 372798720.

The previous prime is 840813131. The next prime is 840813143. The reversal of 840813142 is 241318048.

840813142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840813143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62034 + ... + 74362.

It is an arithmetic number, because the mean of its divisors is an integer number (44147565).

Almost surely, 2^840813142 is an apocalyptic number.

840813142 is a deficient number, since it is larger than the sum of its proper divisors (571908938).

840813142 is a wasteful number, since it uses less digits than its factorization.

840813142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12448.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 840813142 is about 28996.7781313718. The cubic root of 840813142 is about 943.8431546308.

It can be divided in two parts, 840 and 813142, that multiplied together give a triangular number (683039280 = T₃₆₉₆₀).

The spelling of 840813142 in words is "eight hundred forty million, eight hundred thirteen thousand, one hundred forty-two".