855207742 has 4 divisors (see below), whose sum is σ = 1282811616. Its totient is φ = 427603870.

The previous prime is 855207737. The next prime is 855207791. The reversal of 855207742 is 247702558.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 247702558 = 2 ⋅123851279.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 855207695 and 855207704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213801934 + ... + 213801937.

It is an arithmetic number, because the mean of its divisors is an integer number (320702904).

Almost surely, 2^855207742 is an apocalyptic number.

855207742 is a deficient number, since it is larger than the sum of its proper divisors (427603874).

855207742 is a wasteful number, since it uses less digits than its factorization.

855207742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427603873.

The product of its (nonzero) digits is 156800, while the sum is 40.

The square root of 855207742 is about 29243.9351319209. The cubic root of 855207742 is about 949.1988599490.

The spelling of 855207742 in words is "eight hundred fifty-five million, two hundred seven thousand, seven hundred forty-two".