861472131 has 16 divisors (see below), whose sum is σ = 1255451904. Its totient is φ = 522222624.

The previous prime is 861472109. The next prime is 861472187. The reversal of 861472131 is 131274168.

It is not a de Polignac number, because 861472131 - 2²³ = 853083523 is a prime.

It is a super-2 number, since 2×861472131² = 1484268464979362322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 861472092 and 861472101.

It is not an unprimeable number, because it can be changed into a prime (861472831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162231 + ... + 167456.

It is an arithmetic number, because the mean of its divisors is an integer number (78465744).

Almost surely, 2^861472131 is an apocalyptic number.

861472131 is a deficient number, since it is larger than the sum of its proper divisors (393979773).

861472131 is a wasteful number, since it uses less digits than its factorization.

861472131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329770.

The product of its digits is 8064, while the sum is 33.

The square root of 861472131 is about 29350.8454903773. The cubic root of 861472131 is about 951.5108483702.

The spelling of 861472131 in words is "eight hundred sixty-one million, four hundred seventy-two thousand, one hundred thirty-one".