2782421 has 2 divisors, whose sum is σ = 2782422. Its totient is φ = 2782420.

The previous prime is 2782411. The next prime is 2782469. The reversal of 2782421 is 1242872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2686321 + 96100 = 1639^2 + 310^2 .

It is a cyclic number.

It is not a de Polignac number, because 2782421 - 2¹⁰ = 2781397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2782411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1391210 + 1391211.

It is an arithmetic number, because the mean of its divisors is an integer number (1391211).

2^2782421 is an apocalyptic number.

It is an amenable number.

2782421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2782421 is an equidigital number, since it uses as much as digits as its factorization.

2782421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1792, while the sum is 26.

The square root of 2782421 is about 1668.0590517125. The cubic root of 2782421 is about 140.6503921884.

The spelling of 2782421 in words is "two million, seven hundred eighty-two thousand, four hundred twenty-one".