1861004 has 12 divisors (see below), whose sum is σ = 3289104. Its totient is φ = 921264.

The previous prime is 1861001. The next prime is 1861009. The reversal of 1861004 is 4001681.

It is not an unprimeable number, because it can be changed into a prime (1861001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1847 + ... + 2670.

It is an arithmetic number, because the mean of its divisors is an integer number (274092).

2^1861004 is an apocalyptic number.

It is an amenable number.

1861004 is a deficient number, since it is larger than the sum of its proper divisors (1428100).

1861004 is a wasteful number, since it uses less digits than its factorization.

1861004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4624 (or 4622 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1861004 is about 1364.1862042991. The cubic root of 1861004 is about 123.0030184114.

Adding to 1861004 its reverse (4001681), we get a palindrome (5862685).

The spelling of 1861004 in words is "one million, eight hundred sixty-one thousand, four".