1851461 has 4 divisors (see below), whose sum is σ = 1854924. Its totient is φ = 1848000.

The previous prime is 1851457. The next prime is 1851463. The reversal of 1851461 is 1641581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1641581 = 19 ⋅86399.

It can be written as a sum of positive squares in 2 ways, for example, as 1221025 + 630436 = 1105^2 + 794^2 .

It is a cyclic number.

It is not a de Polignac number, because 1851461 - 2² = 1851457 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 1851461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1851463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 740 + ... + 2061.

It is an arithmetic number, because the mean of its divisors is an integer number (463731).

2^1851461 is an apocalyptic number.

It is an amenable number.

1851461 is a deficient number, since it is larger than the sum of its proper divisors (3463).

1851461 is an equidigital number, since it uses as much as digits as its factorization.

1851461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3462.

The product of its digits is 960, while the sum is 26.

The square root of 1851461 is about 1360.6840191610. The cubic root of 1851461 is about 122.7924098836.

The spelling of 1851461 in words is "one million, eight hundred fifty-one thousand, four hundred sixty-one".