351861 has 8 divisors (see below), whose sum is σ = 493920. Its totient is φ = 222192.

The previous prime is 351859. The next prime is 351863. The reversal of 351861 is 168153.

It is an interprime number because it is at equal distance from previous prime (351859) and next prime (351863).

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

It is not a de Polignac number, because 351861 - 2¹ = 351859 is a prime.

351861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351863) 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, 3030 + ... + 3143.

It is an arithmetic number, because the mean of its divisors is an integer number (61740).

2³⁵¹⁸⁶¹ is an apocalyptic number.

It is an amenable number.

351861 is a deficient number, since it is larger than the sum of its proper divisors (142059).

351861 is a wasteful number, since it uses less digits than its factorization.

351861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6195.

The product of its digits is 720, while the sum is 24.

The square root of 351861 is about 593.1787251748. The cubic root of 351861 is about 70.5976715735.

The spelling of 351861 in words is "three hundred fifty-one thousand, eight hundred sixty-one".