1145240405 has 8 divisors (see below), whose sum is σ = 1374471384. Its totient is φ = 916070400.

The previous prime is 1145240387. The next prime is 1145240431. The reversal of 1145240405 is 5040425411.

It can be written as a sum of positive squares in 4 ways, for example, as 140730769 + 1004509636 = 11863^2 + 31694^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1145240405 - 2⁸ = 1145240149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58685 + ... + 75725.

It is an arithmetic number, because the mean of its divisors is an integer number (171808923).

Almost surely, 2^1145240405 is an apocalyptic number.

It is an amenable number.

1145240405 is a deficient number, since it is larger than the sum of its proper divisors (229230979).

1145240405 is a wasteful number, since it uses less digits than its factorization.

1145240405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30487.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 1145240405 is about 33841.4007541059. The cubic root of 1145240405 is about 1046.2421696159.

Adding to 1145240405 its reverse (5040425411), we get a palindrome (6185665816).

The spelling of 1145240405 in words is "one billion, one hundred forty-five million, two hundred forty thousand, four hundred five".