861956134 has 32 divisors (see below), whose sum is σ = 1499329440. Its totient is φ = 368067072.

The previous prime is 861956131. The next prime is 861956143. The reversal of 861956134 is 431659168.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861956131) 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, 9552 + ... + 42604.

It is an arithmetic number, because the mean of its divisors is an integer number (46854045).

Almost surely, 2^861956134 is an apocalyptic number.

861956134 is a deficient number, since it is larger than the sum of its proper divisors (637373306).

861956134 is a wasteful number, since it uses less digits than its factorization.

861956134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33144.

The product of its digits is 155520, while the sum is 43.

The square root of 861956134 is about 29359.0894613576. The cubic root of 861956134 is about 951.6890115662.

It can be divided in two parts, 86195 and 6134, that added together give a palindrome (92329).

The spelling of 861956134 in words is "eight hundred sixty-one million, nine hundred fifty-six thousand, one hundred thirty-four".