3147421 has 2 divisors, whose sum is σ = 3147422. Its totient is φ = 3147420.

The previous prime is 3147349. The next prime is 3147427. The reversal of 3147421 is 1247413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2515396 + 632025 = 1586^2 + 795^2 .

It is a cyclic number.

It is not a de Polignac number, because 3147421 - 2⁹ = 3146909 is a prime.

It is a Chen prime.

It is equal to p₂₂₆₆₆₀ and since 3147421 and 226660 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 3147392 and 3147401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3147427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1573710 + 1573711.

It is an arithmetic number, because the mean of its divisors is an integer number (1573711).

Almost surely, 2^3147421 is an apocalyptic number.

It is an amenable number.

3147421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3147421 is an equidigital number, since it uses as much as digits as its factorization.

3147421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 22.

The square root of 3147421 is about 1774.0972352157. The cubic root of 3147421 is about 146.5497041564.

The spelling of 3147421 in words is "three million, one hundred forty-seven thousand, four hundred twenty-one".