2698021 has 2 divisors, whose sum is σ = 2698022. Its totient is φ = 2698020.

The previous prime is 2698009. The next prime is 2698027. The reversal of 2698021 is 1208962.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2604996 + 93025 = 1614^2 + 305^2 .

It is a cyclic number.

It is not a de Polignac number, because 2698021 - 2¹⁵ = 2665253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2698027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1349010 + 1349011.

It is an arithmetic number, because the mean of its divisors is an integer number (1349011).

2^2698021 is an apocalyptic number.

It is an amenable number.

2698021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2698021 is an equidigital number, since it uses as much as digits as its factorization.

2698021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 2698021 is about 1642.5653716063. The cubic root of 2698021 is about 139.2136355659.

It can be divided in two parts, 26980 and 21, that multiplied together give a triangular number (566580 = T₁₀₆₄).

The spelling of 2698021 in words is "two million, six hundred ninety-eight thousand, twenty-one".