861492 has 48 divisors (see below), whose sum is σ = 2201472. Its totient is φ = 261120.

The previous prime is 861491. The next prime is 861493. The reversal of 861492 is 294168.

It is an interprime number because it is at equal distance from previous prime (861491) and next prime (861493).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 8313 + ... + 8415.

It is an arithmetic number, because the mean of its divisors is an integer number (45864).

2⁸⁶¹⁴⁹² is an apocalyptic number.

861492 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 861492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1100736).

861492 is an abundant number, since it is smaller than the sum of its proper divisors (1339980).

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

861492 is a wasteful number, since it uses less digits than its factorization.

861492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 166 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 861492 is about 928.1659334408. The cubic root of 861492 is about 95.1518163532.

The spelling of 861492 in words is "eight hundred sixty-one thousand, four hundred ninety-two".