861481258 has 32 divisors (see below), whose sum is σ = 1490711040. Its totient is φ = 369696000.

The previous prime is 861481241. The next prime is 861481267. The reversal of 861481258 is 852184168.

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, 12558 + ... + 43366.

It is an arithmetic number, because the mean of its divisors is an integer number (46584720).

Almost surely, 2^861481258 is an apocalyptic number.

861481258 is a deficient number, since it is larger than the sum of its proper divisors (629229782).

861481258 is a wasteful number, since it uses less digits than its factorization.

861481258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30894.

The product of its digits is 122880, while the sum is 43.

The square root of 861481258 is about 29351.0009710061. Note that the first 3 decimals coincide. The cubic root of 861481258 is about 951.5142086680.

The spelling of 861481258 in words is "eight hundred sixty-one million, four hundred eighty-one thousand, two hundred fifty-eight".