1145272307 has 4 divisors (see below), whose sum is σ = 1157079336. Its totient is φ = 1133465280.

The previous prime is 1145272279. The next prime is 1145272309. The reversal of 1145272307 is 7032725411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7032725411 = 11159 ⋅630229.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1145272307 is a prime.

It is a super-2 number, since 2×1145272307² = 2623297314362204498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145272309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5903369 + ... + 5903562.

It is an arithmetic number, because the mean of its divisors is an integer number (289269834).

Almost surely, 2^1145272307 is an apocalyptic number.

1145272307 is a deficient number, since it is larger than the sum of its proper divisors (11807029).

1145272307 is an equidigital number, since it uses as much as digits as its factorization.

1145272307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11807028.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 1145272307 is about 33841.8720965611. The cubic root of 1145272307 is about 1046.2518842888.

Adding to 1145272307 its reverse (7032725411), we get a palindrome (8177997718).

The spelling of 1145272307 in words is "one billion, one hundred forty-five million, two hundred seventy-two thousand, three hundred seven".