1145462221 has 4 divisors (see below), whose sum is σ = 1147331452. Its totient is φ = 1143592992.

The previous prime is 1145462207. The next prime is 1145462257. The reversal of 1145462221 is 1222645411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1222645411 = 13 ⋅94049647.

It can be written as a sum of positive squares in 2 ways, for example, as 229189321 + 916272900 = 15139^2 + 30270^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145462221 - 2⁵ = 1145462189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1145462221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145466221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 933696 + ... + 934921.

It is an arithmetic number, because the mean of its divisors is an integer number (286832863).

Almost surely, 2^1145462221 is an apocalyptic number.

It is an amenable number.

1145462221 is a deficient number, since it is larger than the sum of its proper divisors (1869231).

1145462221 is an equidigital number, since it uses as much as digits as its factorization.

1145462221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869230.

The product of its digits is 3840, while the sum is 28.

The square root of 1145462221 is about 33844.6778829405. The cubic root of 1145462221 is about 1046.3097124277.

The spelling of 1145462221 in words is "one billion, one hundred forty-five million, four hundred sixty-two thousand, two hundred twenty-one".