1851145 has 8 divisors (see below), whose sum is σ = 2229120. Its totient is φ = 1475760.

The previous prime is 1851139. The next prime is 1851163. The reversal of 1851145 is 5411581.

It is a happy number.

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

It is not a de Polignac number, because 1851145 - 2⁹ = 1850633 is a prime.

It is a super-2 number, since 2×1851145² = 6853475622050, which contains 22 as substring.

It is a nialpdrome in base 12.

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 7 ways as a sum of consecutive naturals, for example, 1726 + ... + 2584.

It is an arithmetic number, because the mean of its divisors is an integer number (278640).

2^1851145 is an apocalyptic number.

It is an amenable number.

1851145 is a deficient number, since it is larger than the sum of its proper divisors (377975).

1851145 is an equidigital number, since it uses as much as digits as its factorization.

1851145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295.

The product of its digits is 800, while the sum is 25.

The square root of 1851145 is about 1360.5678961375. The cubic root of 1851145 is about 122.7854235794.

The spelling of 1851145 in words is "one million, eight hundred fifty-one thousand, one hundred forty-five".