3145477421 has 2 divisors, whose sum is σ = 3145477422. Its totient is φ = 3145477420.

The previous prime is 3145477369. The next prime is 3145477451. The reversal of 3145477421 is 1247745413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1782021796 + 1363455625 = 42214^2 + 36925^2 .

It is a cyclic number.

It is not a de Polignac number, because 3145477421 - 2¹⁸ = 3145215277 is a prime.

It is a super-2 number, since 2×3145477421² = 19788056412041622482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3145477451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1572738710 + 1572738711.

It is an arithmetic number, because the mean of its divisors is an integer number (1572738711).

Almost surely, 2^3145477421 is an apocalyptic number.

It is an amenable number.

3145477421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3145477421 is an equidigital number, since it uses as much as digits as its factorization.

3145477421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 38.

The square root of 3145477421 is about 56084.5559936067. Note that the first 3 decimals coincide. The cubic root of 3145477421 is about 1465.1953240871.

The spelling of 3145477421 in words is "three billion, one hundred forty-five million, four hundred seventy-seven thousand, four hundred twenty-one".