1321123434 has 16 divisors (see below), whose sum is σ = 2646833088. Its totient is φ = 439610112.

The previous prime is 1321123417. The next prime is 1321123439. The reversal of 1321123434 is 4343211231.

It is a happy number.

It is a super-3 number, since 3×1321123434³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1321123439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187342 + ... + 194265.

It is an arithmetic number, because the mean of its divisors is an integer number (165427068).

Almost surely, 2^1321123434 is an apocalyptic number.

1321123434 is an abundant number, since it is smaller than the sum of its proper divisors (1325709654).

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

1321123434 is a wasteful number, since it uses less digits than its factorization.

1321123434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382189.

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

The square root of 1321123434 is about 36347.2617125417. The cubic root of 1321123434 is about 1097.2724251790.

Adding to 1321123434 its reverse (4343211231), we get a palindrome (5664334665).

The spelling of 1321123434 in words is "one billion, three hundred twenty-one million, one hundred twenty-three thousand, four hundred thirty-four".