1642570525 has 12 divisors (see below), whose sum is σ = 2044720692. Its totient is φ = 1308938240.

The previous prime is 1642570511. The next prime is 1642570543. The reversal of 1642570525 is 5250752461.

It can be written as a sum of positive squares in 6 ways, for example, as 59644729 + 1582925796 = 7723^2 + 39786^2 .

It is not a de Polignac number, because 1642570525 - 2⁵ = 1642570493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 121402 + ... + 134251.

It is an arithmetic number, because the mean of its divisors is an integer number (170393391).

Almost surely, 2^1642570525 is an apocalyptic number.

It is an amenable number.

1642570525 is a deficient number, since it is larger than the sum of its proper divisors (402150167).

1642570525 is a wasteful number, since it uses less digits than its factorization.

1642570525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255920 (or 255915 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 1642570525 is about 40528.6383314318. The cubic root of 1642570525 is about 1179.8895149355.

The spelling of 1642570525 in words is "one billion, six hundred forty-two million, five hundred seventy thousand, five hundred twenty-five".