1145211051 has 4 divisors (see below), whose sum is σ = 1526948072. Its totient is φ = 763474032.

The previous prime is 1145211047. The next prime is 1145211059. The reversal of 1145211051 is 1501125411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1501125411 = 3 ⋅500375137.

It is not a de Polignac number, because 1145211051 - 2² = 1145211047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145211059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190868506 + ... + 190868511.

It is an arithmetic number, because the mean of its divisors is an integer number (381737018).

Almost surely, 2^1145211051 is an apocalyptic number.

1145211051 is a deficient number, since it is larger than the sum of its proper divisors (381737021).

1145211051 is an equidigital number, since it uses as much as digits as its factorization.

1145211051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381737020.

The product of its (nonzero) digits is 200, while the sum is 21.

The square root of 1145211051 is about 33840.9670517850. The cubic root of 1145211051 is about 1046.2332306906.

Adding to 1145211051 its reverse (1501125411), we get a palindrome (2646336462).

The spelling of 1145211051 in words is "one billion, one hundred forty-five million, two hundred eleven thousand, fifty-one".