1154212311 has 16 divisors (see below), whose sum is σ = 1772229888. Its totient is φ = 654513600.

The previous prime is 1154212309. The next prime is 1154212349. The reversal of 1154212311 is 1132124511.

It is not a de Polignac number, because 1154212311 - 2¹ = 1154212309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154212211) 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 15 ways as a sum of consecutive naturals, for example, 207030 + ... + 212531.

It is an arithmetic number, because the mean of its divisors is an integer number (110764368).

Almost surely, 2^1154212311 is an apocalyptic number.

1154212311 is a deficient number, since it is larger than the sum of its proper divisors (618017577).

1154212311 is a wasteful number, since it uses less digits than its factorization.

1154212311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419702.

The product of its digits is 240, while the sum is 21.

The square root of 1154212311 is about 33973.7002841904. The cubic root of 1154212311 is about 1048.9671812398.

Adding to 1154212311 its reverse (1132124511), we get a palindrome (2286336822).

The spelling of 1154212311 in words is "one billion, one hundred fifty-four million, two hundred twelve thousand, three hundred eleven".