1621412602 has 8 divisors (see below), whose sum is σ = 2432963700. Its totient is φ = 810424704.

The previous prime is 1621412581. The next prime is 1621412629. The reversal of 1621412602 is 2062141261.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1608731881 + 12680721 = 40109^2 + 3561^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133527 + ... + 145162.

Almost surely, 2^1621412602 is an apocalyptic number.

1621412602 is a deficient number, since it is larger than the sum of its proper divisors (811551098).

1621412602 is a wasteful number, since it uses less digits than its factorization.

1621412602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281600.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1621412602 is about 40266.7679606894. The cubic root of 1621412602 is about 1174.8015604526.

Adding to 1621412602 its reverse (2062141261), we get a palindrome (3683553863).

The spelling of 1621412602 in words is "one billion, six hundred twenty-one million, four hundred twelve thousand, six hundred two".