1857155242 has 16 divisors (see below), whose sum is σ = 2957203080. Its totient is φ = 871702528.

The previous prime is 1857155233. The next prime is 1857155243. The reversal of 1857155242 is 2425517581.

It can be written as a sum of positive squares in 4 ways, for example, as 1759718601 + 97436641 = 41949^2 + 9871^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1857155195 and 1857155204.

It is not an unprimeable number, because it can be changed into a prime (1857155243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56983 + ... + 83434.

Almost surely, 2^1857155242 is an apocalyptic number.

1857155242 is a deficient number, since it is larger than the sum of its proper divisors (1100047838).

1857155242 is a wasteful number, since it uses less digits than its factorization.

1857155242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140825.

The product of its digits is 112000, while the sum is 40.

The square root of 1857155242 is about 43094.7240622330. The cubic root of 1857155242 is about 1229.1816536429.

The spelling of 1857155242 in words is "one billion, eight hundred fifty-seven million, one hundred fifty-five thousand, two hundred forty-two".