1321230135 has 16 divisors (see below), whose sum is σ = 2115440640. Its totient is φ = 704165280.

The previous prime is 1321230109. The next prime is 1321230143. The reversal of 1321230135 is 5310321231.

It is not a de Polignac number, because 1321230135 - 2⁷ = 1321230007 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 7875 + ... + 52004.

It is an arithmetic number, because the mean of its divisors is an integer number (132215040).

Almost surely, 2^1321230135 is an apocalyptic number.

1321230135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1321230135 is a deficient number, since it is larger than the sum of its proper divisors (794210505).

1321230135 is a wasteful number, since it uses less digits than its factorization.

1321230135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61358.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1321230135 is about 36348.7294826105. The cubic root of 1321230135 is about 1097.3019649152.

Adding to 1321230135 its reverse (5310321231), we get a palindrome (6631551366).

The spelling of 1321230135 in words is "one billion, three hundred twenty-one million, two hundred thirty thousand, one hundred thirty-five".