1642445325 has 36 divisors (see below), whose sum is σ = 2950667668. Its totient is φ = 873331200.

The previous prime is 1642445269. The next prime is 1642445339. The reversal of 1642445325 is 5235442461.

1642445325 is a `hidden beast` number, since 1 + 642 + 4 + 4 + 5 + 3 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 200420649 + 1442024676 = 14157^2 + 37974^2 .

It is not a de Polignac number, because 1642445325 - 2¹⁶ = 1642379789 is a prime.

It is a super-2 number, since 2×1642445325² = 5395253291228711250, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1642445325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 64995 + ... + 86655.

Almost surely, 2^1642445325 is an apocalyptic number.

1642445325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1642445325 is a deficient number, since it is larger than the sum of its proper divisors (1308222343).

1642445325 is a wasteful number, since it uses less digits than its factorization.

1642445325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22014 (or 22006 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

The square root of 1642445325 is about 40527.0937151926. The cubic root of 1642445325 is about 1179.8595363302.

Adding to 1642445325 its reverse (5235442461), we get a palindrome (6877887786).

The spelling of 1642445325 in words is "one billion, six hundred forty-two million, four hundred forty-five thousand, three hundred twenty-five".