1145204554 has 16 divisors (see below), whose sum is σ = 1856834280. Its totient is φ = 526587840.

The previous prime is 1145204539. The next prime is 1145204581. The reversal of 1145204554 is 4554025411.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 202407529 + 942797025 = 14227^2 + 30705^2 .

It is a super-2 number, since 2×1145204554² = 2622986941004677832, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74877 + ... + 88864.

Almost surely, 2^1145204554 is an apocalyptic number.

1145204554 is a deficient number, since it is larger than the sum of its proper divisors (711629726).

1145204554 is a wasteful number, since it uses less digits than its factorization.

1145204554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164025.

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

The square root of 1145204554 is about 33840.8710585292. The cubic root of 1145204554 is about 1046.2312521936.

Adding to 1145204554 its reverse (4554025411), we get a palindrome (5699229965).

The spelling of 1145204554 in words is "one billion, one hundred forty-five million, two hundred four thousand, five hundred fifty-four".