1154221087 has 2 divisors, whose sum is σ = 1154221088. Its totient is φ = 1154221086.

The previous prime is 1154221073. The next prime is 1154221129. The reversal of 1154221087 is 7801224511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1154221087 - 2⁷ = 1154220959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1154221487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577110543 + 577110544.

It is an arithmetic number, because the mean of its divisors is an integer number (577110544).

Almost surely, 2^1154221087 is an apocalyptic number.

1154221087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154221087 is an equidigital number, since it uses as much as digits as its factorization.

1154221087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 1154221087 is about 33973.8294426754. The cubic root of 1154221087 is about 1048.9698398243.

Adding to 1154221087 its reverse (7801224511), we get a palindrome (8955445598).

The spelling of 1154221087 in words is "one billion, one hundred fifty-four million, two hundred twenty-one thousand, eighty-seven".