2928421 has 2 divisors, whose sum is σ = 2928422. Its totient is φ = 2928420.

The previous prime is 2928397. The next prime is 2928461. The reversal of 2928421 is 1248292.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2927521 + 900 = 1711^2 + 30^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2928421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2928421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2928461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1464210 + 1464211.

It is an arithmetic number, because the mean of its divisors is an integer number (1464211).

2^2928421 is an apocalyptic number.

It is an amenable number.

2928421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2928421 is an equidigital number, since it uses as much as digits as its factorization.

2928421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 28.

The square root of 2928421 is about 1711.2629838806. The cubic root of 2928421 is about 143.0686582456.

The spelling of 2928421 in words is "two million, nine hundred twenty-eight thousand, four hundred twenty-one".