861254315 has 4 divisors (see below), whose sum is σ = 1033505184. Its totient is φ = 689003448.

The previous prime is 861254311. The next prime is 861254333. The reversal of 861254315 is 513452168.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 861254315 - 2² = 861254311 is a prime.

It is a super-2 number, since 2×861254315² = 1483517990212238450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861254311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86125427 + ... + 86125436.

It is an arithmetic number, because the mean of its divisors is an integer number (258376296).

Almost surely, 2^861254315 is an apocalyptic number.

861254315 is a deficient number, since it is larger than the sum of its proper divisors (172250869).

861254315 is a wasteful number, since it uses less digits than its factorization.

861254315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172250868.

The product of its digits is 28800, while the sum is 35.

The square root of 861254315 is about 29347.1346982972. The cubic root of 861254315 is about 951.4306477657.

The spelling of 861254315 in words is "eight hundred sixty-one million, two hundred fifty-four thousand, three hundred fifteen".