1621424303 has 8 divisors (see below), whose sum is σ = 1630142976. Its totient is φ = 1612719000.

The previous prime is 1621424293. The next prime is 1621424309. The reversal of 1621424303 is 3034241261.

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 1621424303 - 2⁶ = 1621424239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621424309) 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, 321068 + ... + 326078.

It is an arithmetic number, because the mean of its divisors is an integer number (203767872).

Almost surely, 2^1621424303 is an apocalyptic number.

1621424303 is a deficient number, since it is larger than the sum of its proper divisors (8718673).

1621424303 is a wasteful number, since it uses less digits than its factorization.

1621424303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6685.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 1621424303 is about 40266.9132539359. The cubic root of 1621424303 is about 1174.8043864493.

Adding to 1621424303 its reverse (3034241261), we get a palindrome (4655665564).

The spelling of 1621424303 in words is "one billion, six hundred twenty-one million, four hundred twenty-four thousand, three hundred three".