861281130 has 32 divisors (see below), whose sum is σ = 2076197184. Its totient is φ = 228661376.

The previous prime is 861281129. The next prime is 861281131. The reversal of 861281130 is 31182168.

It is an interprime number because it is at equal distance from previous prime (861281129) and next prime (861281131).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (861281131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56427 + ... + 70046.

It is an arithmetic number, because the mean of its divisors is an integer number (64881162).

Almost surely, 2^861281130 is an apocalyptic number.

861281130 is an abundant number, since it is smaller than the sum of its proper divisors (1214916054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

861281130 is a wasteful number, since it uses less digits than its factorization.

861281130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126710.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 861281130 is about 29347.5915536522. The cubic root of 861281130 is about 951.4405218713.

The spelling of 861281130 in words is "eight hundred sixty-one million, two hundred eighty-one thousand, one hundred thirty".