1861045 has 8 divisors (see below), whose sum is σ = 2330496. Its totient is φ = 1424016.

The previous prime is 1861039. The next prime is 1861061. The reversal of 1861045 is 5401681.

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

It is a cyclic number.

It is not a de Polignac number, because 1861045 - 2⁹ = 1860533 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7977 + ... + 8206.

It is an arithmetic number, because the mean of its divisors is an integer number (291312).

2^1861045 is an apocalyptic number.

It is an amenable number.

1861045 is a deficient number, since it is larger than the sum of its proper divisors (469451).

1861045 is a wasteful number, since it uses less digits than its factorization.

1861045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16211.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1861045 is about 1364.2012314904. The cubic root of 1861045 is about 123.0039217028.

The spelling of 1861045 in words is "one million, eight hundred sixty-one thousand, forty-five".