3121261 has 24 divisors (see below), whose sum is σ = 3900096. Its totient is φ = 2471040.

The previous prime is 3121259. The next prime is 3121267. The reversal of 3121261 is 1621213.

It is not a de Polignac number, because 3121261 - 2¹ = 3121259 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 (3121267) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42721 + ... + 42793.

It is an arithmetic number, because the mean of its divisors is an integer number (162504).

Almost surely, 2^3121261 is an apocalyptic number.

It is an amenable number.

3121261 is a deficient number, since it is larger than the sum of its proper divisors (778835).

3121261 is a wasteful number, since it uses less digits than its factorization.

3121261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 120 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 3121261 is about 1766.7090875410. The cubic root of 3121261 is about 146.1425548277.

Adding to 3121261 its reverse (1621213), we get a palindrome (4742474).

The spelling of 3121261 in words is "three million, one hundred twenty-one thousand, two hundred sixty-one".