1221744834 has 12 divisors (see below), whose sum is σ = 2647113846. Its totient is φ = 407248272.

The previous prime is 1221744829. The next prime is 1221744869. The reversal of 1221744834 is 4384471221.

1221744834 is a `hidden beast` number, since 1 + 2 + 2 + 174 + 483 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1101908025 + 119836809 = 33195^2 + 10947^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33937339 + ... + 33937374.

Almost surely, 2^1221744834 is an apocalyptic number.

1221744834 is an abundant number, since it is smaller than the sum of its proper divisors (1425369012).

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

1221744834 is a wasteful number, since it uses less digits than its factorization.

1221744834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67874721 (or 67874718 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 1221744834 is about 34953.4666950218. The cubic root of 1221744834 is about 1069.0388883152.

The spelling of 1221744834 in words is "one billion, two hundred twenty-one million, seven hundred forty-four thousand, eight hundred thirty-four".