3971415 has 32 divisors (see below), whose sum is σ = 7349760. Its totient is φ = 1793664.

The previous prime is 3971413. The next prime is 3971423. The reversal of 3971415 is 5141793.

It is not a de Polignac number, because 3971415 - 2¹ = 3971413 is a prime.

3971415 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3971411) 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, 11272 + ... + 11618.

It is an arithmetic number, because the mean of its divisors is an integer number (229680).

Almost surely, 2^3971415 is an apocalyptic number.

3971415 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3971415 is a deficient number, since it is larger than the sum of its proper divisors (3378345).

3971415 is a wasteful number, since it uses less digits than its factorization.

3971415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471.

The product of its digits is 3780, while the sum is 30.

The square root of 3971415 is about 1992.8409369541. The cubic root of 3971415 is about 158.3610687024.

The spelling of 3971415 in words is "three million, nine hundred seventy-one thousand, four hundred fifteen".