1253557171 has 2 divisors, whose sum is σ = 1253557172. Its totient is φ = 1253557170.

The previous prime is 1253557159. The next prime is 1253557189. The reversal of 1253557171 is 1717553521.

It is a weak prime.

It is an emirp because it is prime and its reverse (1717553521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1253557171 - 2¹³ = 1253548979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1253557171.

It is not a weakly prime, because it can be changed into another prime (1253557771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626778585 + 626778586.

It is an arithmetic number, because the mean of its divisors is an integer number (626778586).

Almost surely, 2^1253557171 is an apocalyptic number.

1253557171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253557171 is an equidigital number, since it uses as much as digits as its factorization.

1253557171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36750, while the sum is 37.

The square root of 1253557171 is about 35405.6093154743. The cubic root of 1253557171 is about 1078.2382029432.

The spelling of 1253557171 in words is "one billion, two hundred fifty-three million, five hundred fifty-seven thousand, one hundred seventy-one".