3121288 has 8 divisors (see below), whose sum is σ = 5852430. Its totient is φ = 1560640.

The previous prime is 3121273. The next prime is 3121291. The reversal of 3121288 is 8821213.

It can be written as a sum of positive squares in only one way, i.e., 2683044 + 438244 = 1638^2 + 662^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195073 + ... + 195088.

Almost surely, 2^3121288 is an apocalyptic number.

It is an amenable number.

3121288 is a deficient number, since it is larger than the sum of its proper divisors (2731142).

3121288 is a wasteful number, since it uses less digits than its factorization.

3121288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390167 (or 390163 counting only the distinct ones).

The product of its digits is 768, while the sum is 25.

The square root of 3121288 is about 1766.7167288504. The cubic root of 3121288 is about 146.1429762212.

It can be divided in two parts, 312 and 1288, that multiplied together give a triangular number (401856 = T₈₉₆).

The spelling of 3121288 in words is "three million, one hundred twenty-one thousand, two hundred eighty-eight".