1145380331 has 4 divisors (see below), whose sum is σ = 1146148992. Its totient is φ = 1144611672.

The previous prime is 1145380303. The next prime is 1145380337. The reversal of 1145380331 is 1330835411.

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

It is a cyclic number.

It is not a de Polignac number, because 1145380331 - 2¹⁰ = 1145379307 is a prime.

It is a super-2 number, since 2×1145380331² = 2623792205283339122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1145380294 and 1145380303.

It is not an unprimeable number, because it can be changed into a prime (1145380337) 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, 382091 + ... + 385076.

It is an arithmetic number, because the mean of its divisors is an integer number (286537248).

Almost surely, 2^1145380331 is an apocalyptic number.

1145380331 is a deficient number, since it is larger than the sum of its proper divisors (768661).

1145380331 is an equidigital number, since it uses as much as digits as its factorization.

1145380331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768660.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1145380331 is about 33843.4680699245. The cubic root of 1145380331 is about 1046.2847779973.

The spelling of 1145380331 in words is "one billion, one hundred forty-five million, three hundred eighty thousand, three hundred thirty-one".