3921995 has 32 divisors (see below), whose sum is σ = 5999616. Its totient is φ = 2390400.

The previous prime is 3921991. The next prime is 3921997. The reversal of 3921995 is 5991293.

It is not a de Polignac number, because 3921995 - 2² = 3921991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921991) 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 31 ways as a sum of consecutive naturals, for example, 23402 + ... + 23568.

It is an arithmetic number, because the mean of its divisors is an integer number (187488).

Almost surely, 2^3921995 is an apocalyptic number.

3921995 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3921995 is a deficient number, since it is larger than the sum of its proper divisors (2077621).

3921995 is a wasteful number, since it uses less digits than its factorization.

3921995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251.

The product of its digits is 21870, while the sum is 38.

The square root of 3921995 is about 1980.4027368190. The cubic root of 3921995 is about 157.7014471129.

The spelling of 3921995 in words is "three million, nine hundred twenty-one thousand, nine hundred ninety-five".