861450 has 24 divisors (see below), whose sum is σ = 2136768. Its totient is φ = 229680.

The previous prime is 861439. The next prime is 861491. The reversal of 861450 is 54168.

It is a super-2 number, since 2×861450² = 1484192205000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 861450.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2722 + ... + 3021.

It is an arithmetic number, because the mean of its divisors is an integer number (89032).

2⁸⁶¹⁴⁵⁰ is an apocalyptic number.

861450 is an abundant number, since it is smaller than the sum of its proper divisors (1275318).

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

861450 is a wasteful number, since it uses less digits than its factorization.

861450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5758 (or 5753 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 861450 is about 928.1433079002. The cubic root of 861450 is about 95.1502700276.

The spelling of 861450 in words is "eight hundred sixty-one thousand, four hundred fifty".