6921261 has 24 divisors (see below), whose sum is σ = 10904640. Its totient is φ = 4337856.

The previous prime is 6921247. The next prime is 6921281. The reversal of 6921261 is 1621296.

It is not a de Polignac number, because 6921261 - 2⁶ = 6921197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6921221) 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, 7360 + ... + 8246.

It is an arithmetic number, because the mean of its divisors is an integer number (454360).

Almost surely, 2^6921261 is an apocalyptic number.

It is an amenable number.

6921261 is a deficient number, since it is larger than the sum of its proper divisors (3983379).

6921261 is a wasteful number, since it uses less digits than its factorization.

6921261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930 (or 907 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 6921261 is about 2630.8289568119. The cubic root of 6921261 is about 190.5731630439.

It can be divided in two parts, 692 and 1261, that added together give a triangular number (1953 = T₆₂).

The spelling of 6921261 in words is "six million, nine hundred twenty-one thousand, two hundred sixty-one".