3925161 has 12 divisors (see below), whose sum is σ = 5695092. Its totient is φ = 2605056.

The previous prime is 3925151. The next prime is 3925171. The reversal of 3925161 is 1615293.

It is an interprime number because it is at equal distance from previous prime (3925151) and next prime (3925171).

It can be written as a sum of positive squares in 2 ways, for example, as 3825936 + 99225 = 1956^2 + 315^2 .

It is not a de Polignac number, because 3925161 - 2⁹ = 3924649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3925151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1465 + ... + 3161.

It is an arithmetic number, because the mean of its divisors is an integer number (474591).

Almost surely, 2^3925161 is an apocalyptic number.

It is an amenable number.

3925161 is a deficient number, since it is larger than the sum of its proper divisors (1769931).

3925161 is a wasteful number, since it uses less digits than its factorization.

3925161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960 (or 1957 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 3925161 is about 1981.2019079337. The cubic root of 3925161 is about 157.7438701225.

It can be divided in two parts, 39 and 25161, that added together give a triangular number (25200 = T₂₂₄).

The spelling of 3925161 in words is "three million, nine hundred twenty-five thousand, one hundred sixty-one".