6921425 has 12 divisors (see below), whose sum is σ = 9808896. Its totient is φ = 4746000.

The previous prime is 6921403. The next prime is 6921437. The reversal of 6921425 is 5241296.

It is a happy number.

It is not a de Polignac number, because 6921425 - 2¹² = 6917329 is a prime.

It is a super-2 number, since 2×6921425² = 95812248061250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19601 + ... + 19950.

It is an arithmetic number, because the mean of its divisors is an integer number (817408).

Almost surely, 2^6921425 is an apocalyptic number.

It is an amenable number.

6921425 is a deficient number, since it is larger than the sum of its proper divisors (2887471).

6921425 is a wasteful number, since it uses less digits than its factorization.

6921425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39568 (or 39563 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 6921425 is about 2630.8601255103. The cubic root of 6921425 is about 190.5746682490.

The spelling of 6921425 in words is "six million, nine hundred twenty-one thousand, four hundred twenty-five".