1864458121 has 2 divisors, whose sum is σ = 1864458122. Its totient is φ = 1864458120.

The previous prime is 1864458109. The next prime is 1864458143. The reversal of 1864458121 is 1218544681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1719014521 + 145443600 = 41461^2 + 12060^2 .

It is a cyclic number.

It is not a de Polignac number, because 1864458121 - 2¹³ = 1864449929 is a prime.

It is not a weakly prime, because it can be changed into another prime (1864458721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932229060 + 932229061.

It is an arithmetic number, because the mean of its divisors is an integer number (932229061).

Almost surely, 2^1864458121 is an apocalyptic number.

It is an amenable number.

1864458121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1864458121 is an equidigital number, since it uses as much as digits as its factorization.

1864458121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61440, while the sum is 40.

The square root of 1864458121 is about 43179.3714752774. The cubic root of 1864458121 is about 1230.7907139516.

The spelling of 1864458121 in words is "one billion, eight hundred sixty-four million, four hundred fifty-eight thousand, one hundred twenty-one".