3261389 has 4 divisors (see below), whose sum is σ = 3291420. Its totient is φ = 3231360.

The previous prime is 3261373. The next prime is 3261397. The reversal of 3261389 is 9831623.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9831623 = 1277 ⋅7699.

It can be written as a sum of positive squares in 2 ways, for example, as 2175625 + 1085764 = 1475^2 + 1042^2 .

It is a cyclic number.

It is not a de Polignac number, because 3261389 - 2⁴ = 3261373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3261889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14852 + ... + 15069.

It is an arithmetic number, because the mean of its divisors is an integer number (822855).

Almost surely, 2^3261389 is an apocalyptic number.

It is an amenable number.

3261389 is a deficient number, since it is larger than the sum of its proper divisors (30031).

3261389 is a wasteful number, since it uses less digits than its factorization.

3261389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30030.

The product of its digits is 7776, while the sum is 32.

The square root of 3261389 is about 1805.9316155381. The cubic root of 3261389 is about 148.2976266647.

The spelling of 3261389 in words is "three million, two hundred sixty-one thousand, three hundred eighty-nine".