1149255545 has 4 divisors (see below), whose sum is σ = 1379106660. Its totient is φ = 919404432.

The previous prime is 1149255521. The next prime is 1149255589. The reversal of 1149255545 is 5455529411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5455529411 = 43 ⋅126872777.

It can be written as a sum of positive squares in 2 ways, for example, as 482944576 + 666310969 = 21976^2 + 25813^2 .

It is a cyclic number.

It is not a de Polignac number, because 1149255545 - 2¹⁸ = 1148993401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114925550 + ... + 114925559.

It is an arithmetic number, because the mean of its divisors is an integer number (344776665).

Almost surely, 2^1149255545 is an apocalyptic number.

It is an amenable number.

1149255545 is a deficient number, since it is larger than the sum of its proper divisors (229851115).

1149255545 is an equidigital number, since it uses as much as digits as its factorization.

1149255545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229851114.

The product of its digits is 180000, while the sum is 41.

The square root of 1149255545 is about 33900.6717485067. The cubic root of 1149255545 is about 1047.4634296675.

The spelling of 1149255545 in words is "one billion, one hundred forty-nine million, two hundred fifty-five thousand, five hundred forty-five".