1881026281 has 2 divisors, whose sum is σ = 1881026282. Its totient is φ = 1881026280.

The previous prime is 1881026269. The next prime is 1881026291. The reversal of 1881026281 is 1826201881.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 963481600 + 917544681 = 31040^2 + 30291^2 .

It is a cyclic number.

It is not a de Polignac number, because 1881026281 - 2¹³ = 1881018089 is a prime.

It is a super-2 number, since 2×1881026281² = 7076519739625381922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1881026281.

It is not a weakly prime, because it can be changed into another prime (1881026291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 940513140 + 940513141.

It is an arithmetic number, because the mean of its divisors is an integer number (940513141).

Almost surely, 2^1881026281 is an apocalyptic number.

It is an amenable number.

1881026281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1881026281 is an equidigital number, since it uses as much as digits as its factorization.

1881026281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 37.

The square root of 1881026281 is about 43370.7998658083. The cubic root of 1881026281 is about 1234.4256987656.

The spelling of 1881026281 in words is "one billion, eight hundred eighty-one million, twenty-six thousand, two hundred eighty-one".