3781021305 has 64 divisors (see below), whose sum is σ = 6455427840. Its totient is φ = 1886137344.

The previous prime is 3781021249. The next prime is 3781021327. The reversal of 3781021305 is 5031201873.

It is not a de Polignac number, because 3781021305 - 2⁶ = 3781021241 is a prime.

It is a super-2 number, since 2×3781021305² = 28592244217727806050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5584627 + ... + 5585303.

It is an arithmetic number, because the mean of its divisors is an integer number (100866060).

Almost surely, 2^3781021305 is an apocalyptic number.

It is an amenable number.

3781021305 is a deficient number, since it is larger than the sum of its proper divisors (2674406535).

3781021305 is a wasteful number, since it uses less digits than its factorization.

3781021305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 3781021305 is about 61490.0097983404. The cubic root of 3781021305 is about 1557.8885121069. Note that the first 3 decimals are identical.

The spelling of 3781021305 in words is "three billion, seven hundred eighty-one million, twenty-one thousand, three hundred five".