1253551289 has 2 divisors, whose sum is σ = 1253551290. Its totient is φ = 1253551288.

The previous prime is 1253551279. The next prime is 1253551291. The reversal of 1253551289 is 9821553521.

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., 1069813264 + 183738025 = 32708^2 + 13555^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253551289 - 2¹² = 1253547193 is a prime.

Together with 1253551291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1253551259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626775644 + 626775645.

It is an arithmetic number, because the mean of its divisors is an integer number (626775645).

Almost surely, 2^1253551289 is an apocalyptic number.

It is an amenable number.

1253551289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253551289 is an equidigital number, since it uses as much as digits as its factorization.

1253551289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 41.

The square root of 1253551289 is about 35405.5262494430. The cubic root of 1253551289 is about 1078.2365164872.

The spelling of 1253551289 in words is "one billion, two hundred fifty-three million, five hundred fifty-one thousand, two hundred eighty-nine".