865195130 has 16 divisors (see below), whose sum is σ = 1571640840. Its totient is φ = 342902592.

The previous prime is 865195109. The next prime is 865195139. The reversal of 865195130 is 31591568.

It can be written as a sum of positive squares in 4 ways, for example, as 752898721 + 112296409 = 27439^2 + 10597^2 .

It is a super-2 number, since 2×865195130² = 1497125225951433800, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (865195139) 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, 395789 + ... + 397968.

Almost surely, 2^865195130 is an apocalyptic number.

865195130 is a deficient number, since it is larger than the sum of its proper divisors (706445710).

865195130 is a wasteful number, since it uses less digits than its factorization.

865195130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793873.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 865195130 is about 29414.1994621645. The cubic root of 865195130 is about 952.8795840848.

The spelling of 865195130 in words is "eight hundred sixty-five million, one hundred ninety-five thousand, one hundred thirty".