1957170842 has 16 divisors (see below), whose sum is σ = 3203377632. Its totient is φ = 889419120.

The previous prime is 1957170811. The next prime is 1957170847. The reversal of 1957170842 is 2480717591.

It is a junction number, because it is equal to n+sod(n) for n = 1957170793 and 1957170802.

It is not an unprimeable number, because it can be changed into a prime (1957170847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131933 + ... + 146015.

It is an arithmetic number, because the mean of its divisors is an integer number (200211102).

Almost surely, 2^1957170842 is an apocalyptic number.

1957170842 is a deficient number, since it is larger than the sum of its proper divisors (1246206790).

1957170842 is a wasteful number, since it uses less digits than its factorization.

1957170842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20413.

The product of its (nonzero) digits is 141120, while the sum is 44.

The square root of 1957170842 is about 44239.9236210914. The cubic root of 1957170842 is about 1250.8625176737.

The spelling of 1957170842 in words is "one billion, nine hundred fifty-seven million, one hundred seventy thousand, eight hundred forty-two".