1151024321 has 4 divisors (see below), whose sum is σ = 1218731652. Its totient is φ = 1083316992.

The previous prime is 1151024309. The next prime is 1151024323. The reversal of 1151024321 is 1234201511.

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 939729025 + 211295296 = 30655^2 + 14536^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151024321 - 2¹⁰ = 1151023297 is a prime.

It is a super-2 number, since 2×1151024321² = 2649713975067022082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1151024293 and 1151024302.

It is not an unprimeable number, because it can be changed into a prime (1151024323) 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, 33853640 + ... + 33853673.

It is an arithmetic number, because the mean of its divisors is an integer number (304682913).

Almost surely, 2^1151024321 is an apocalyptic number.

It is an amenable number.

1151024321 is a deficient number, since it is larger than the sum of its proper divisors (67707331).

1151024321 is an equidigital number, since it uses as much as digits as its factorization.

1151024321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67707330.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1151024321 is about 33926.7493432542. The cubic root of 1151024321 is about 1048.0005247482. Note that the first 3 decimals are identical.

Adding to 1151024321 its reverse (1234201511), we get a palindrome (2385225832).

The spelling of 1151024321 in words is "one billion, one hundred fifty-one million, twenty-four thousand, three hundred twenty-one".