1321135410 has 64 divisors (see below), whose sum is σ = 3781251072. Its totient is φ = 288843456.

The previous prime is 1321135381. The next prime is 1321135429. The reversal of 1321135410 is 145311231.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131934 + ... + 141593.

It is an arithmetic number, because the mean of its divisors is an integer number (59082048).

Almost surely, 2^1321135410 is an apocalyptic number.

1321135410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321135410 is an abundant number, since it is smaller than the sum of its proper divisors (2460115662).

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

1321135410 is a wasteful number, since it uses less digits than its factorization.

1321135410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273567.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1321135410 is about 36347.4264563531. The cubic root of 1321135410 is about 1097.2757407649.

Adding to 1321135410 its reverse (145311231), we get a palindrome (1466446641).

The spelling of 1321135410 in words is "one billion, three hundred twenty-one million, one hundred thirty-five thousand, four hundred ten".