861357 has 8 divisors (see below), whose sum is σ = 1312576. Its totient is φ = 492192.

The previous prime is 861353. The next prime is 861361. The reversal of 861357 is 753168.

861357 = T₄₃₃ + T₄₃₄ + ... + T₄₄₁.

861357 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (861353) and next prime (861361).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 861357 - 2² = 861353 is a prime.

It is a Duffinian number.

861357 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 861357.

It is not an unprimeable number, because it can be changed into a prime (861353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20488 + ... + 20529.

It is an arithmetic number, because the mean of its divisors is an integer number (164072).

2⁸⁶¹³⁵⁷ is an apocalyptic number.

It is an amenable number.

861357 is a deficient number, since it is larger than the sum of its proper divisors (451219).

861357 is a wasteful number, since it uses less digits than its factorization.

861357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41027.

The product of its digits is 5040, while the sum is 30.

The square root of 861357 is about 928.0932065262. The cubic root of 861357 is about 95.1468458422.

The spelling of 861357 in words is "eight hundred sixty-one thousand, three hundred fifty-seven".