2170494842 has 4 divisors (see below), whose sum is σ = 3255742266. Its totient is φ = 1085247420.

The previous prime is 2170494841. The next prime is 2170494877. The reversal of 2170494842 is 2484940712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1699995361 + 470499481 = 41231^2 + 21691^2 .

It is a super-2 number, since 2×2170494842² = 9422095718297209928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2170494842.

It is not an unprimeable number, because it can be changed into a prime (2170494841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542623709 + ... + 542623712.

Almost surely, 2^2170494842 is an apocalyptic number.

2170494842 is a deficient number, since it is larger than the sum of its proper divisors (1085247424).

2170494842 is a wasteful number, since it uses less digits than its factorization.

2170494842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085247423.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 2170494842 is about 46588.5698642918. The cubic root of 2170494842 is about 1294.7509928052.

The spelling of 2170494842 in words is "two billion, one hundred seventy million, four hundred ninety-four thousand, eight hundred forty-two".