1254040289 has 2 divisors, whose sum is σ = 1254040290. Its totient is φ = 1254040288.

The previous prime is 1254040283. The next prime is 1254040331. The reversal of 1254040289 is 9820404521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1047169600 + 206870689 = 32360^2 + 14383^2 .

It is a cyclic number.

It is not a de Polignac number, because 1254040289 - 2²⁸ = 985604833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1254040283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627020144 + 627020145.

It is an arithmetic number, because the mean of its divisors is an integer number (627020145).

Almost surely, 2^1254040289 is an apocalyptic number.

It is an amenable number.

1254040289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254040289 is an equidigital number, since it uses as much as digits as its factorization.

1254040289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 1254040289 is about 35412.4312777307. The cubic root of 1254040289 is about 1078.3767019790.

The spelling of 1254040289 in words is "one billion, two hundred fifty-four million, forty thousand, two hundred eighty-nine".