1151204427 has 8 divisors (see below), whose sum is σ = 1705488080. Its totient is φ = 767469600.

The previous prime is 1151204423. The next prime is 1151204443. The reversal of 1151204427 is 7244021511.

1151204427 is a `hidden beast` number, since 115 + 120 + 4 + 427 = 666.

It is not a de Polignac number, because 1151204427 - 2² = 1151204423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 42637201 = 1151204427 / (1 + 1 + 5 + 1 + 2 + 0 + 4 + 4 + 2 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1151204427.

It is not an unprimeable number, because it can be changed into a prime (1151204423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21318574 + ... + 21318627.

It is an arithmetic number, because the mean of its divisors is an integer number (213186010).

Almost surely, 2^1151204427 is an apocalyptic number.

1151204427 is a deficient number, since it is larger than the sum of its proper divisors (554283653).

1151204427 is an equidigital number, since it uses as much as digits as its factorization.

1151204427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42637210 (or 42637204 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1151204427 is about 33929.4035756599. The cubic root of 1151204427 is about 1048.0551836970.

Adding to 1151204427 its reverse (7244021511), we get a palindrome (8395225938).

The spelling of 1151204427 in words is "one billion, one hundred fifty-one million, two hundred four thousand, four hundred twenty-seven".