1145721151 has 2 divisors, whose sum is σ = 1145721152. Its totient is φ = 1145721150.

The previous prime is 1145721133. The next prime is 1145721167. The reversal of 1145721151 is 1511275411.

It is a strong prime.

It is an emirp because it is prime and its reverse (1511275411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1145721151 - 2⁷ = 1145721023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145721251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572860575 + 572860576.

It is an arithmetic number, because the mean of its divisors is an integer number (572860576).

Almost surely, 2^1145721151 is an apocalyptic number.

1145721151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145721151 is an equidigital number, since it uses as much as digits as its factorization.

1145721151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1400, while the sum is 28.

The square root of 1145721151 is about 33848.5029358759. The cubic root of 1145721151 is about 1046.3885453965.

Adding to 1145721151 its reverse (1511275411), we get a palindrome (2656996562).

The spelling of 1145721151 in words is "one billion, one hundred forty-five million, seven hundred twenty-one thousand, one hundred fifty-one".