1851131 has 6 divisors (see below), whose sum is σ = 1889580. Its totient is φ = 1813448.

The previous prime is 1851127. The next prime is 1851133. The reversal of 1851131 is 1311581.

It is not a de Polignac number, because 1851131 - 2² = 1851127 is a prime.

It is a super-2 number, since 2×1851131² = 6853371958322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1851133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2480 + ... + 3138.

It is an arithmetic number, because the mean of its divisors is an integer number (314930).

2^1851131 is an apocalyptic number.

1851131 is a deficient number, since it is larger than the sum of its proper divisors (38449).

1851131 is an frugal number, since it uses more digits than its factorization.

1851131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 712 counting only the distinct ones).

The product of its digits is 120, while the sum is 20.

The square root of 1851131 is about 1360.5627512173. The cubic root of 1851131 is about 122.7851140412.

The spelling of 1851131 in words is "one million, eight hundred fifty-one thousand, one hundred thirty-one".