1887256141 has 2 divisors, whose sum is σ = 1887256142. Its totient is φ = 1887256140.

The previous prime is 1887256121. The next prime is 1887256157. The reversal of 1887256141 is 1416527881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1411580041 + 475676100 = 37571^2 + 21810^2 .

It is a cyclic number.

It is not a de Polignac number, because 1887256141 - 2⁵ = 1887256109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1887256121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 943628070 + 943628071.

It is an arithmetic number, because the mean of its divisors is an integer number (943628071).

Almost surely, 2^1887256141 is an apocalyptic number.

It is an amenable number.

1887256141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1887256141 is an equidigital number, since it uses as much as digits as its factorization.

1887256141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 43.

The square root of 1887256141 is about 43442.5614000832. The cubic root of 1887256141 is about 1235.7869813436.

The spelling of 1887256141 in words is "one billion, eight hundred eighty-seven million, two hundred fifty-six thousand, one hundred forty-one".