855020842 has 8 divisors (see below), whose sum is σ = 1381187556. Its totient is φ = 394624992.

The previous prime is 855020821. The next prime is 855020863. The reversal of 855020842 is 248020558.

It is an interprime number because it is at equal distance from previous prime (855020821) and next prime (855020863).

It can be written as a sum of positive squares in 2 ways, for example, as 623950441 + 231070401 = 24979^2 + 15201^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 855020798 and 855020807.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16442683 + ... + 16442734.

Almost surely, 2^855020842 is an apocalyptic number.

855020842 is a deficient number, since it is larger than the sum of its proper divisors (526166714).

855020842 is a wasteful number, since it uses less digits than its factorization.

855020842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32885432.

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 855020842 is about 29240.7394229353. The cubic root of 855020842 is about 949.1297078653.

It can be divided in two parts, 8550 and 20842, that added together give a palindrome (29392).

The spelling of 855020842 in words is "eight hundred fifty-five million, twenty thousand, eight hundred forty-two".