861458 has 16 divisors (see below), whose sum is σ = 1474200. Its totient is φ = 374016.

The previous prime is 861439. The next prime is 861491. The reversal of 861458 is 854168.

It can be written as a sum of positive squares in 4 ways, for example, as 797449 + 64009 = 893^2 + 253^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 861458.

It is an unprimeable number.

861458 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 533 + ... + 1416.

2⁸⁶¹⁴⁵⁸ is an apocalyptic number.

861458 is a deficient number, since it is larger than the sum of its proper divisors (612742).

861458 is a wasteful number, since it uses less digits than its factorization.

861458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981.

The product of its digits is 7680, while the sum is 32.

The square root of 861458 is about 928.1476175695. The cubic root of 861458 is about 95.1505645697.

The spelling of 861458 in words is "eight hundred sixty-one thousand, four hundred fifty-eight".