1642352420 has 12 divisors (see below), whose sum is σ = 3448940124. Its totient is φ = 656940960.

The previous prime is 1642352359. The next prime is 1642352423. The reversal of 1642352420 is 242532461.

It can be written as a sum of positive squares in 2 ways, for example, as 963854116 + 678498304 = 31046^2 + 26048^2 .

It is not an unprimeable number, because it can be changed into a prime (1642352423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41058791 + ... + 41058830.

It is an arithmetic number, because the mean of its divisors is an integer number (287411677).

Almost surely, 2^1642352420 is an apocalyptic number.

1642352420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1642352420 is an abundant number, since it is smaller than the sum of its proper divisors (1806587704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1642352420 is a wasteful number, since it uses less digits than its factorization.

1642352420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82117630 (or 82117628 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 1642352420 is about 40525.9474904659. The cubic root of 1642352420 is about 1179.8372896400.

Adding to 1642352420 its reverse (242532461), we get a palindrome (1884884881).

The spelling of 1642352420 in words is "one billion, six hundred forty-two million, three hundred fifty-two thousand, four hundred twenty".