2519921 has 2 divisors, whose sum is σ = 2519922. Its totient is φ = 2519920.

The previous prime is 2519911. The next prime is 2519939. The reversal of 2519921 is 1299152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1690000 + 829921 = 1300^2 + 911^2 .

It is a cyclic number.

It is not a de Polignac number, because 2519921 - 2¹⁴ = 2503537 is a prime.

It is not a weakly prime, because it can be changed into another prime (2519911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1259960 + 1259961.

It is an arithmetic number, because the mean of its divisors is an integer number (1259961).

2^2519921 is an apocalyptic number.

It is an amenable number.

2519921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2519921 is an equidigital number, since it uses as much as digits as its factorization.

2519921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 29.

The square root of 2519921 is about 1587.4259037826. The cubic root of 2519921 is about 136.0804202850.

The spelling of 2519921 in words is "two million, five hundred nineteen thousand, nine hundred twenty-one".