1145419221 has 4 divisors (see below), whose sum is σ = 1527225632. Its totient is φ = 763612812.

The previous prime is 1145419213. The next prime is 1145419229. The reversal of 1145419221 is 1229145411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1145419213) and next prime (1145419229).

It is not a de Polignac number, because 1145419221 - 2³ = 1145419213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145419229) 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, 190903201 + ... + 190903206.

It is an arithmetic number, because the mean of its divisors is an integer number (381806408).

Almost surely, 2^1145419221 is an apocalyptic number.

It is an amenable number.

1145419221 is a deficient number, since it is larger than the sum of its proper divisors (381806411).

1145419221 is an equidigital number, since it uses as much as digits as its factorization.

1145419221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381806410.

The product of its digits is 2880, while the sum is 30.

The square root of 1145419221 is about 33844.0426220037. The cubic root of 1145419221 is about 1046.2966196401.

The spelling of 1145419221 in words is "one billion, one hundred forty-five million, four hundred nineteen thousand, two hundred twenty-one".