861498 has 48 divisors (see below), whose sum is σ = 2152800. Its totient is φ = 246240.

The previous prime is 861493. The next prime is 861499. The reversal of 861498 is 894168.

It is a happy number.

861498 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (861491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3648 + ... + 3876.

It is an arithmetic number, because the mean of its divisors is an integer number (44850).

2⁸⁶¹⁴⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 861498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1076400).

861498 is an abundant number, since it is smaller than the sum of its proper divisors (1291302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

861498 is a wasteful number, since it uses less digits than its factorization.

861498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 264 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 861498 is about 928.1691656158. The cubic root of 861498 is about 95.1520372527.

The spelling of 861498 in words is "eight hundred sixty-one thousand, four hundred ninety-eight".