1861141 has 2 divisors, whose sum is σ = 1861142. Its totient is φ = 1861140.

The previous prime is 1861121. The next prime is 1861151. The reversal of 1861141 is 1411681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1102500 + 758641 = 1050^2 + 871^2 .

It is a cyclic number.

It is not a de Polignac number, because 1861141 - 2⁹ = 1860629 is a prime.

It is equal to p₁₃₉₃₃₃ and since 1861141 and 139333 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1861121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 930570 + 930571.

It is an arithmetic number, because the mean of its divisors is an integer number (930571).

2^1861141 is an apocalyptic number.

It is an amenable number.

1861141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1861141 is an equidigital number, since it uses as much as digits as its factorization.

1861141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 22.

The square root of 1861141 is about 1364.2364164616. The cubic root of 1861141 is about 123.0060366747.

It can be divided in two parts, 1861 and 141, that added together give a palindrome (2002).

The spelling of 1861141 in words is "one million, eight hundred sixty-one thousand, one hundred forty-one".