1620420527 has 8 divisors (see below), whose sum is σ = 1794116352. Its totient is φ = 1451122200.

The previous prime is 1620420517. The next prime is 1620420547. The reversal of 1620420527 is 7250240261.

It is a happy number.

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

It is not a de Polignac number, because 1620420527 - 2⁴ = 1620420511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1620420527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620420517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1098599 + ... + 1100072.

It is an arithmetic number, because the mean of its divisors is an integer number (224264544).

Almost surely, 2^1620420527 is an apocalyptic number.

1620420527 is a deficient number, since it is larger than the sum of its proper divisors (173695825).

1620420527 is a wasteful number, since it uses less digits than its factorization.

1620420527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2198749.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 1620420527 is about 40254.4472946779. The cubic root of 1620420527 is about 1174.5619074811.

Adding to 1620420527 its reverse (7250240261), we get a palindrome (8870660788).

The spelling of 1620420527 in words is "one billion, six hundred twenty million, four hundred twenty thousand, five hundred twenty-seven".