1221264134 has 8 divisors (see below), whose sum is σ = 1843135320. Its totient is φ = 606885696.

The previous prime is 1221264119. The next prime is 1221264151. The reversal of 1221264134 is 4314621221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1872779 + ... + 1873430.

It is an arithmetic number, because the mean of its divisors is an integer number (230391915).

Almost surely, 2^1221264134 is an apocalyptic number.

1221264134 is a deficient number, since it is larger than the sum of its proper divisors (621871186).

1221264134 is a wasteful number, since it uses less digits than its factorization.

1221264134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3746374.

The product of its digits is 2304, while the sum is 26.

The square root of 1221264134 is about 34946.5897334776. The cubic root of 1221264134 is about 1068.8986641618.

Adding to 1221264134 its reverse (4314621221), we get a palindrome (5535885355).

The spelling of 1221264134 in words is "one billion, two hundred twenty-one million, two hundred sixty-four thousand, one hundred thirty-four".