1151045321 has 4 divisors (see below), whose sum is σ = 1182154692. Its totient is φ = 1119935952.

The previous prime is 1151045309. The next prime is 1151045347. The reversal of 1151045321 is 1235401511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 535459600 + 615585721 = 23140^2 + 24811^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151045321 - 2⁶ = 1151045257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151045381) 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, 15554630 + ... + 15554703.

It is an arithmetic number, because the mean of its divisors is an integer number (295538673).

Almost surely, 2^1151045321 is an apocalyptic number.

It is an amenable number.

1151045321 is a deficient number, since it is larger than the sum of its proper divisors (31109371).

1151045321 is an equidigital number, since it uses as much as digits as its factorization.

1151045321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31109370.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1151045321 is about 33927.0588321475. The cubic root of 1151045321 is about 1048.0068981661.

Adding to 1151045321 its reverse (1235401511), we get a palindrome (2386446832).

The spelling of 1151045321 in words is "one billion, one hundred fifty-one million, forty-five thousand, three hundred twenty-one".