1254045217 has 2 divisors, whose sum is σ = 1254045218. Its totient is φ = 1254045216.

The previous prime is 1254045209. The next prime is 1254045241. The reversal of 1254045217 is 7125404521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1206103441 + 47941776 = 34729^2 + 6924^2 .

It is an emirp because it is prime and its reverse (7125404521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1254045217 - 2³ = 1254045209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1254045917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627022608 + 627022609.

It is an arithmetic number, because the mean of its divisors is an integer number (627022609).

Almost surely, 2^1254045217 is an apocalyptic number.

It is an amenable number.

1254045217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254045217 is an equidigital number, since it uses as much as digits as its factorization.

1254045217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 1254045217 is about 35412.5008577480. The cubic root of 1254045217 is about 1078.3781145422.

Adding to 1254045217 its reverse (7125404521), we get a palindrome (8379449738).

The spelling of 1254045217 in words is "one billion, two hundred fifty-four million, forty-five thousand, two hundred seventeen".