1145569247 has 4 divisors (see below), whose sum is σ = 1176530616. Its totient is φ = 1114607880.

The previous prime is 1145569231. The next prime is 1145569267. The reversal of 1145569247 is 7429655411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7429655411 = 499 ⋅14889089.

It is a cyclic number.

It is not a de Polignac number, because 1145569247 - 2⁴ = 1145569231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1145569198 and 1145569207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145569267) 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, 15480629 + ... + 15480702.

It is an arithmetic number, because the mean of its divisors is an integer number (294132654).

Almost surely, 2^1145569247 is an apocalyptic number.

1145569247 is a deficient number, since it is larger than the sum of its proper divisors (30961369).

1145569247 is an equidigital number, since it uses as much as digits as its factorization.

1145569247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30961368.

The product of its digits is 302400, while the sum is 44.

The square root of 1145569247 is about 33846.2589808682. The cubic root of 1145569247 is about 1046.3422986489.

The spelling of 1145569247 in words is "one billion, one hundred forty-five million, five hundred sixty-nine thousand, two hundred forty-seven".