1145244505 has 4 divisors (see below), whose sum is σ = 1374293412. Its totient is φ = 916195600.

The previous prime is 1145244493. The next prime is 1145244509. The reversal of 1145244505 is 5054425411.

It is a happy number.

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 353891344 + 791353161 = 18812^2 + 28131^2 .

It is not a de Polignac number, because 1145244505 - 2⁵ = 1145244473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145244509) 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, 114524446 + ... + 114524455.

It is an arithmetic number, because the mean of its divisors is an integer number (343573353).

Almost surely, 2^1145244505 is an apocalyptic number.

It is an amenable number.

1145244505 is a deficient number, since it is larger than the sum of its proper divisors (229048907).

1145244505 is an equidigital number, since it uses as much as digits as its factorization.

1145244505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229048906.

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 1145244505 is about 33841.4613307404. The cubic root of 1145244505 is about 1046.2434181420.

Adding to 1145244505 its reverse (5054425411), we get a palindrome (6199669916).

The spelling of 1145244505 in words is "one billion, one hundred forty-five million, two hundred forty-four thousand, five hundred five".