1145297321 has 32 divisors (see below), whose sum is σ = 1374105600. Its totient is φ = 934254720.

The previous prime is 1145297233. The next prime is 1145297339. The reversal of 1145297321 is 1237925411.

It is not a de Polignac number, because 1145297321 - 2¹⁴ = 1145280937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1145297221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4046846 + ... + 4047128.

It is an arithmetic number, because the mean of its divisors is an integer number (42940800).

Almost surely, 2^1145297321 is an apocalyptic number.

It is an amenable number.

1145297321 is a deficient number, since it is larger than the sum of its proper divisors (228808279).

1145297321 is a wasteful number, since it uses less digits than its factorization.

1145297321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629.

The product of its digits is 15120, while the sum is 35.

The square root of 1145297321 is about 33842.2416662963. The cubic root of 1145297321 is about 1046.2595013285.

The spelling of 1145297321 in words is "one billion, one hundred forty-five million, two hundred ninety-seven thousand, three hundred twenty-one".