1861286 has 8 divisors (see below), whose sum is σ = 3190800. Its totient is φ = 797688.

The previous prime is 1861267. The next prime is 1861303. The reversal of 1861286 is 6821681.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66461 + ... + 66488.

It is an arithmetic number, because the mean of its divisors is an integer number (398850).

2^1861286 is an apocalyptic number.

1861286 is a deficient number, since it is larger than the sum of its proper divisors (1329514).

1861286 is a wasteful number, since it uses less digits than its factorization.

1861286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132958.

The product of its digits is 4608, while the sum is 32.

The square root of 1861286 is about 1364.2895587081. The cubic root of 1861286 is about 123.0092310255.

The spelling of 1861286 in words is "one million, eight hundred sixty-one thousand, two hundred eighty-six".