1221000434 has 16 divisors (see below), whose sum is σ = 1866252960. Its totient is φ = 599021280.

The previous prime is 1221000421. The next prime is 1221000449. The reversal of 1221000434 is 4340001221.

It is an unprimeable number.

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, 2864 + ... + 49499.

It is an arithmetic number, because the mean of its divisors is an integer number (116640810).

Almost surely, 2^1221000434 is an apocalyptic number.

1221000434 is a deficient number, since it is larger than the sum of its proper divisors (645252526).

1221000434 is a wasteful number, since it uses less digits than its factorization.

1221000434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52585.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1221000434 is about 34942.8166294591. The cubic root of 1221000434 is about 1068.8217250679.

Adding to 1221000434 its reverse (4340001221), we get a palindrome (5561001655).

The spelling of 1221000434 in words is "one billion, two hundred twenty-one million, four hundred thirty-four", and thus it is an aban number.