6121881 has 6 divisors (see below), whose sum is σ = 8842730. Its totient is φ = 4081248.

The previous prime is 6121879. The next prime is 6121883. The reversal of 6121881 is 1881216.

It is an interprime number because it is at equal distance from previous prime (6121879) and next prime (6121883).

It can be written as a sum of positive squares in only one way, i.e., 4473225 + 1648656 = 2115^2 + 1284^2 .

It is not a de Polignac number, because 6121881 - 2¹ = 6121879 is a prime.

It is a super-2 number, since 2×6121881² = 74954853956322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6121883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 340096 + ... + 340113.

Almost surely, 2^6121881 is an apocalyptic number.

It is an amenable number.

6121881 is a deficient number, since it is larger than the sum of its proper divisors (2720849).

6121881 is a wasteful number, since it uses less digits than its factorization.

6121881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680215 (or 680212 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 6121881 is about 2474.2435207554. The cubic root of 6121881 is about 182.9342234266.

The spelling of 6121881 in words is "six million, one hundred twenty-one thousand, eight hundred eighty-one".