1221302634 has 32 divisors (see below), whose sum is σ = 2573007360. Its totient is φ = 385398000.

The previous prime is 1221302617. The next prime is 1221302639. The reversal of 1221302634 is 4362031221.

It is not an unprimeable number, because it can be changed into a prime (1221302639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205809 + ... + 211659.

It is an arithmetic number, because the mean of its divisors is an integer number (80406480).

Almost surely, 2^1221302634 is an apocalyptic number.

1221302634 is an abundant number, since it is smaller than the sum of its proper divisors (1351704726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221302634 is a wasteful number, since it uses less digits than its factorization.

1221302634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7706.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1221302634 is about 34947.1405697233. The cubic root of 1221302634 is about 1068.9098962846.

Adding to 1221302634 its reverse (4362031221), we get a palindrome (5583333855).

The spelling of 1221302634 in words is "one billion, two hundred twenty-one million, three hundred two thousand, six hundred thirty-four".