3947161 has 8 divisors (see below), whose sum is σ = 4118400. Its totient is φ = 3778320.

The previous prime is 3947147. The next prime is 3947173. The reversal of 3947161 is 1617493.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3947161 - 2¹⁷ = 3816089 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3280 + ... + 4318.

It is an arithmetic number, because the mean of its divisors is an integer number (514800).

Almost surely, 2^3947161 is an apocalyptic number.

3947161 is the 889-th centered decagonal number.

It is an amenable number.

3947161 is a deficient number, since it is larger than the sum of its proper divisors (171239).

3947161 is a wasteful number, since it uses less digits than its factorization.

3947161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199.

The product of its digits is 4536, while the sum is 31.

The square root of 3947161 is about 1986.7463350916. The cubic root of 3947161 is about 158.0380322908.

The spelling of 3947161 in words is "three million, nine hundred forty-seven thousand, one hundred sixty-one".