2519021 has 2 divisors, whose sum is σ = 2519022. Its totient is φ = 2519020.

The previous prime is 2519017. The next prime is 2519047. The reversal of 2519021 is 1209152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2175625 + 343396 = 1475^2 + 586^2 .

It is a cyclic number.

It is not a de Polignac number, because 2519021 - 2² = 2519017 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2518984 and 2519002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2519051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1259510 + 1259511.

It is an arithmetic number, because the mean of its divisors is an integer number (1259511).

2^2519021 is an apocalyptic number.

It is an amenable number.

2519021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2519021 is an equidigital number, since it uses as much as digits as its factorization.

2519021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 2519021 is about 1587.1424006686. The cubic root of 2519021 is about 136.0642177980.

The spelling of 2519021 in words is "two million, five hundred nineteen thousand, twenty-one".