3721261 has 4 divisors (see below), whose sum is σ = 3743712. Its totient is φ = 3698812.

The previous prime is 3721259. The next prime is 3721273. The reversal of 3721261 is 1621273.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1621273 = 17 ⋅95369.

It is a cyclic number.

It is not a de Polignac number, because 3721261 - 2¹ = 3721259 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 (3724261) 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, 10975 + ... + 11308.

It is an arithmetic number, because the mean of its divisors is an integer number (935928).

Almost surely, 2^3721261 is an apocalyptic number.

It is an amenable number.

3721261 is a deficient number, since it is larger than the sum of its proper divisors (22451).

3721261 is a wasteful number, since it uses less digits than its factorization.

3721261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22450.

The product of its digits is 504, while the sum is 22.

The square root of 3721261 is about 1929.0570235221. The cubic root of 3721261 is about 154.9637237339.

It can be divided in two parts, 37212 and 61, that added together give a palindrome (37273).

The spelling of 3721261 in words is "three million, seven hundred twenty-one thousand, two hundred sixty-one".