1871461 has 2 divisors, whose sum is σ = 1871462. Its totient is φ = 1871460.

The previous prime is 1871459. The next prime is 1871473. The reversal of 1871461 is 1641781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1050625 + 820836 = 1025^2 + 906^2 .

It is a cyclic number.

It is not a de Polignac number, because 1871461 - 2¹ = 1871459 is a prime.

Together with 1871459, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1871491) by changing a digit.

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 as a sum of consecutive naturals, namely, 935730 + 935731.

It is an arithmetic number, because the mean of its divisors is an integer number (935731).

2^1871461 is an apocalyptic number.

It is an amenable number.

1871461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1871461 is an equidigital number, since it uses as much as digits as its factorization.

1871461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 28.

The square root of 1871461 is about 1368.0135233250. The cubic root of 1871461 is about 123.2329733030.

It can be divided in two parts, 1871 and 461, that added together give a palindrome (2332).

The spelling of 1871461 in words is "one million, eight hundred seventy-one thousand, four hundred sixty-one".