1621452034 has 4 divisors (see below), whose sum is σ = 2432178054. Its totient is φ = 810726016.

The previous prime is 1621452023. The next prime is 1621452047. The reversal of 1621452034 is 4302541261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 867125809 + 754326225 = 29447^2 + 27465^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1621451993 and 1621452011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405363007 + ... + 405363010.

Almost surely, 2^1621452034 is an apocalyptic number.

1621452034 is a deficient number, since it is larger than the sum of its proper divisors (810726020).

1621452034 is an equidigital number, since it uses as much as digits as its factorization.

1621452034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810726019.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1621452034 is about 40267.2575922424. The cubic root of 1621452034 is about 1174.8110839178.

Adding to 1621452034 its reverse (4302541261), we get a palindrome (5923993295).

The spelling of 1621452034 in words is "one billion, six hundred twenty-one million, four hundred fifty-two thousand, thirty-four".