6961021 has 8 divisors (see below), whose sum is σ = 7205688. Its totient is φ = 6724000.

The previous prime is 6961013. The next prime is 6961027. The reversal of 6961021 is 1201696.

It can be written as a sum of positive squares in 4 ways, for example, as 1920996 + 5040025 = 1386^2 + 2245^2 .

It is not a de Polignac number, because 6961021 - 2³ = 6961013 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 (6961027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68871 + ... + 68971.

It is an arithmetic number, because the mean of its divisors is an integer number (900711).

Almost surely, 2^6961021 is an apocalyptic number.

It is an amenable number.

6961021 is a deficient number, since it is larger than the sum of its proper divisors (244667).

6961021 is an frugal number, since it uses more digits than its factorization.

6961021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 6961021 is about 2638.3746890842. The cubic root of 6961021 is about 190.9373898200.

The spelling of 6961021 in words is "six million, nine hundred sixty-one thousand, twenty-one".