1861002 has 64 divisors (see below), whose sum is σ = 4878720. Its totient is φ = 518400.

The previous prime is 1861001. The next prime is 1861009. The reversal of 1861002 is 2001681.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 7602 + ... + 7842.

It is an arithmetic number, because the mean of its divisors is an integer number (76230).

2^1861002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1861002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2439360).

1861002 is an abundant number, since it is smaller than the sum of its proper divisors (3017718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1861002 is a wasteful number, since it uses less digits than its factorization.

1861002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1861002 is about 1364.1854712611. The cubic root of 1861002 is about 123.0029743481.

Adding to 1861002 its reverse (2001681), we get a palindrome (3862683).

The spelling of 1861002 in words is "one million, eight hundred sixty-one thousand, two".