1145021447 has 2 divisors, whose sum is σ = 1145021448. Its totient is φ = 1145021446.

The previous prime is 1145021441. The next prime is 1145021467. The reversal of 1145021447 is 7441205411.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1145021447 - 2¹⁸ = 1144759303 is a prime.

It is a super-2 number, since 2×1145021447² = 2622148228179947618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145021441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572510723 + 572510724.

It is an arithmetic number, because the mean of its divisors is an integer number (572510724).

Almost surely, 2^1145021447 is an apocalyptic number.

1145021447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145021447 is an equidigital number, since it uses as much as digits as its factorization.

1145021447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 1145021447 is about 33838.1655383385. The cubic root of 1145021447 is about 1046.1754885089.

Adding to 1145021447 its reverse (7441205411), we get a palindrome (8586226858).

The spelling of 1145021447 in words is "one billion, one hundred forty-five million, twenty-one thousand, four hundred forty-seven".