1144605257 has 8 divisors (see below), whose sum is σ = 1217373696. Its totient is φ = 1072441152.

The previous prime is 1144605227. The next prime is 1144605299. The reversal of 1144605257 is 7525064411.

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

It is a cyclic number.

It is not a de Polignac number, because 1144605257 - 2¹⁴ = 1144588873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144605227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147173 + ... + 154754.

It is an arithmetic number, because the mean of its divisors is an integer number (152171712).

Almost surely, 2^1144605257 is an apocalyptic number.

1144605257 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1144605257 is a deficient number, since it is larger than the sum of its proper divisors (72768439).

1144605257 is a wasteful number, since it uses less digits than its factorization.

1144605257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302167.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 1144605257 is about 33832.0152666080. The cubic root of 1144605257 is about 1046.0487192557.

Adding to 1144605257 its reverse (7525064411), we get a palindrome (8669669668).

The spelling of 1144605257 in words is "one billion, one hundred forty-four million, six hundred five thousand, two hundred fifty-seven".