1145245217 has 2 divisors, whose sum is σ = 1145245218. Its totient is φ = 1145245216.

The previous prime is 1145245163. The next prime is 1145245223. The reversal of 1145245217 is 7125425411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 852698401 + 292546816 = 29201^2 + 17104^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145245217 - 2¹⁶ = 1145179681 is a prime.

It is a super-2 number, since 2×1145245217² = 2623173214122754178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1145245117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572622608 + 572622609.

It is an arithmetic number, because the mean of its divisors is an integer number (572622609).

Almost surely, 2^1145245217 is an apocalyptic number.

It is an amenable number.

1145245217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145245217 is an equidigital number, since it uses as much as digits as its factorization.

1145245217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11200, while the sum is 32.

The square root of 1145245217 is about 33841.4718503791. The cubic root of 1145245217 is about 1046.2436349589.

The spelling of 1145245217 in words is "one billion, one hundred forty-five million, two hundred forty-five thousand, two hundred seventeen".