1620043525 has 12 divisors (see below), whose sum is σ = 2096196192. Its totient is φ = 1239685040.

The previous prime is 1620043519. The next prime is 1620043541. The reversal of 1620043525 is 5253400261.

It is not a de Polignac number, because 1620043525 - 2⁹ = 1620043013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1620043493 and 1620043502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1408159 + ... + 1409308.

It is an arithmetic number, because the mean of its divisors is an integer number (174683016).

Almost surely, 2^1620043525 is an apocalyptic number.

It is an amenable number.

1620043525 is a deficient number, since it is larger than the sum of its proper divisors (476152667).

1620043525 is a wasteful number, since it uses less digits than its factorization.

1620043525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2817500 (or 2817495 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1620043525 is about 40249.7642850241. The cubic root of 1620043525 is about 1174.4708104425.

Adding to 1620043525 its reverse (5253400261), we get a palindrome (6873443786).

The spelling of 1620043525 in words is "one billion, six hundred twenty million, forty-three thousand, five hundred twenty-five".