842145493 has 24 divisors (see below), whose sum is σ = 1043342592. Its totient is φ = 665291232.

The previous prime is 842145463. The next prime is 842145517. The reversal of 842145493 is 394541248.

842145493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-842145493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842145463) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88996 + ... + 98002.

It is an arithmetic number, because the mean of its divisors is an integer number (43472608).

Almost surely, 2^842145493 is an apocalyptic number.

It is an amenable number.

842145493 is a deficient number, since it is larger than the sum of its proper divisors (201197099).

842145493 is a wasteful number, since it uses less digits than its factorization.

842145493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9089 (or 9070 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 842145493 is about 29019.7431587531. The cubic root of 842145493 is about 944.3414289265.

The spelling of 842145493 in words is "eight hundred forty-two million, one hundred forty-five thousand, four hundred ninety-three".