3861421725 has 36 divisors (see below), whose sum is σ = 7426545504. Its totient is φ = 1765219680.

The previous prime is 3861421673. The next prime is 3861421741. The reversal of 3861421725 is 5271241683.

It is not a de Polignac number, because 3861421725 - 2⁸ = 3861421469 is a prime.

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 35 ways as a sum of consecutive naturals, for example, 521689 + ... + 529038.

Almost surely, 2^3861421725 is an apocalyptic number.

3861421725 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3861421725 is a deficient number, since it is larger than the sum of its proper divisors (3565123779).

3861421725 is a wasteful number, since it uses less digits than its factorization.

3861421725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050754 (or 1050742 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 3861421725 is about 62140.3389514412. The cubic root of 3861421725 is about 1568.8535756971.

The spelling of 3861421725 in words is "three billion, eight hundred sixty-one million, four hundred twenty-one thousand, seven hundred twenty-five".