1642113530 has 32 divisors (see below), whose sum is σ = 2972341008. Its totient is φ = 653184000.

The previous prime is 1642113527. The next prime is 1642113533. The reversal of 1642113530 is 353112461.

It is a Cunningham number, because it is equal to 40523²+1.

It is an interprime number because it is at equal distance from previous prime (1642113527) and next prime (1642113533).

It can be written as a sum of positive squares in 8 ways, for example, as 591121969 + 1050991561 = 24313^2 + 32419^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1642113530.

It is not an unprimeable number, because it can be changed into a prime (1642113533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2342180 + ... + 2342880.

Almost surely, 2^1642113530 is an apocalyptic number.

1642113530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1642113530 is a deficient number, since it is larger than the sum of its proper divisors (1330227478).

1642113530 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (1642113529) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (1682).

1642113530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1642113530 is about 40523.0000123387. Note that the first 4 decimals coincide. The cubic root of 1642113530 is about 1179.7800820651.

Adding to 1642113530 its reverse (353112461), we get a palindrome (1995225991).

The spelling of 1642113530 in words is "one billion, six hundred forty-two million, one hundred thirteen thousand, five hundred thirty".