1421165309 has 8 divisors (see below), whose sum is σ = 1430161920. Its totient is φ = 1412180800.

The previous prime is 1421165299. The next prime is 1421165311. The reversal of 1421165309 is 9035611241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1421165309 - 2⁴ = 1421165293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421165359) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 375989 + ... + 379749.

It is an arithmetic number, because the mean of its divisors is an integer number (178770240).

Almost surely, 2^1421165309 is an apocalyptic number.

It is an amenable number.

1421165309 is a deficient number, since it is larger than the sum of its proper divisors (8996611).

1421165309 is a wasteful number, since it uses less digits than its factorization.

1421165309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6051.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1421165309 is about 37698.3462369372. The cubic root of 1421165309 is about 1124.2982445539.

The spelling of 1421165309 in words is "one billion, four hundred twenty-one million, one hundred sixty-five thousand, three hundred nine".