3891261 has 8 divisors (see below), whose sum is σ = 5660064. Its totient is φ = 2358320.

The previous prime is 3891259. The next prime is 3891263. The reversal of 3891261 is 1621983.

It is an interprime number because it is at equal distance from previous prime (3891259) and next prime (3891263).

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 3891261 - 2¹ = 3891259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891263) 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, 58926 + ... + 58991.

It is an arithmetic number, because the mean of its divisors is an integer number (707508).

Almost surely, 2^3891261 is an apocalyptic number.

It is an amenable number.

3891261 is a deficient number, since it is larger than the sum of its proper divisors (1768803).

3891261 is a wasteful number, since it uses less digits than its factorization.

3891261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117931.

The product of its digits is 2592, while the sum is 30.

The square root of 3891261 is about 1972.6279426187. The cubic root of 3891261 is about 157.2884334954.

The spelling of 3891261 in words is "three million, eight hundred ninety-one thousand, two hundred sixty-one".