1211544134 has 16 divisors (see below), whose sum is σ = 1934858016. Its totient is φ = 566985600.

The previous prime is 1211544091. The next prime is 1211544143. The reversal of 1211544134 is 4314451121.

It is a congruent number.

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, 92282 + ... + 104589.

It is an arithmetic number, because the mean of its divisors is an integer number (120928626).

Almost surely, 2^1211544134 is an apocalyptic number.

1211544134 is a deficient number, since it is larger than the sum of its proper divisors (723313882).

1211544134 is a wasteful number, since it uses less digits than its factorization.

1211544134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197071.

The product of its digits is 1920, while the sum is 26.

The square root of 1211544134 is about 34807.2425509405. The cubic root of 1211544134 is about 1066.0553313131.

Adding to 1211544134 its reverse (4314451121), we get a palindrome (5525995255).

The spelling of 1211544134 in words is "one billion, two hundred eleven million, five hundred forty-four thousand, one hundred thirty-four".