861298 has 4 divisors (see below), whose sum is σ = 1291950. Its totient is φ = 430648.

The previous prime is 861293. The next prime is 861299. The reversal of 861298 is 892168.

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

It can be written as a sum of positive squares in only one way, i.e., 786769 + 74529 = 887^2 + 273^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (861293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215323 + ... + 215326.

2⁸⁶¹²⁹⁸ is an apocalyptic number.

861298 is a deficient number, since it is larger than the sum of its proper divisors (430652).

861298 is a wasteful number, since it uses less digits than its factorization.

861298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430651.

The product of its digits is 6912, while the sum is 34.

The square root of 861298 is about 928.0614203812. The cubic root of 861298 is about 95.1446733818.

It can be divided in two parts, 86 and 1298, that multiplied together give a triangular number (111628 = T₄₇₂).

The spelling of 861298 in words is "eight hundred sixty-one thousand, two hundred ninety-eight".