1621214435 has 8 divisors (see below), whose sum is σ = 2059896096. Its totient is φ = 1220679040.

The previous prime is 1621214393. The next prime is 1621214453. The reversal of 1621214435 is 5344121261.

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

It is not a de Polignac number, because 1621214435 - 2¹⁰ = 1621213411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1621214398 and 1621214407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9536471 + ... + 9536640.

It is an arithmetic number, because the mean of its divisors is an integer number (257487012).

Almost surely, 2^1621214435 is an apocalyptic number.

1621214435 is a deficient number, since it is larger than the sum of its proper divisors (438681661).

1621214435 is a wasteful number, since it uses less digits than its factorization.

1621214435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19073133.

The product of its digits is 5760, while the sum is 29.

The square root of 1621214435 is about 40264.3072087426. The cubic root of 1621214435 is about 1174.7536975817.

Adding to 1621214435 its reverse (5344121261), we get a palindrome (6965335696).

The spelling of 1621214435 in words is "one billion, six hundred twenty-one million, two hundred fourteen thousand, four hundred thirty-five".