1871198245 has 16 divisors (see below), whose sum is σ = 2717169408. Its totient is φ = 1207630080.

The previous prime is 1871198237. The next prime is 1871198257. The reversal of 1871198245 is 5428911781.

It is not a de Polignac number, because 1871198245 - 2³ = 1871198237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1871198195 and 1871198204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1571841 + ... + 1573030.

It is an arithmetic number, because the mean of its divisors is an integer number (169823088).

Almost surely, 2^1871198245 is an apocalyptic number.

It is an amenable number.

1871198245 is a deficient number, since it is larger than the sum of its proper divisors (845971163).

1871198245 is a wasteful number, since it uses less digits than its factorization.

1871198245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144900.

The product of its digits is 161280, while the sum is 46.

The square root of 1871198245 is about 43257.3490288067. The cubic root of 1871198245 is about 1232.2720568877.

It can be divided in two parts, 187119 and 8245, that added together give a square (195364 = 442²).

The spelling of 1871198245 in words is "one billion, eight hundred seventy-one million, one hundred ninety-eight thousand, two hundred forty-five".