1165744449 has 27 divisors (see below), whose sum is σ = 1780113153. Its totient is φ = 735030504.

The previous prime is 1165744387. The next prime is 1165744453. The reversal of 1165744449 is 9444475611.

The square root of 1165744449 is 34143.

It is a perfect power (a square), and thus also a powerful number.

1165744449 is a `hidden beast` number, since 1 + 165 + 7 + 44 + 449 = 666.

It is not a de Polignac number, because 1165744449 - 2¹¹ = 1165742401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1165744649) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1945852 + ... + 1946450.

Almost surely, 2^1165744449 is an apocalyptic number.

1165744449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1165744449 is the 34143-rd square number.

1165744449 is the 17072-nd centered octagonal number.

It is an amenable number.

1165744449 is a deficient number, since it is larger than the sum of its proper divisors (614368704).

1165744449 is an frugal number, since it uses more digits than its factorization.

1165744449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242 (or 621 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The cubic root of 1165744449 is about 1052.4491427554.

The spelling of 1165744449 in words is "one billion, one hundred sixty-five million, seven hundred forty-four thousand, four hundred forty-nine".