2501999 has 2 divisors, whose sum is σ = 2502000. Its totient is φ = 2501998.

The previous prime is 2501987. The next prime is 2502001. The reversal of 2501999 is 9991052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2501999 - 2¹² = 2497903 is a prime.

Together with 2502001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2501959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250999 + 1251000.

It is an arithmetic number, because the mean of its divisors is an integer number (1251000).

2^2501999 is an apocalyptic number.

2501999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2501999 is an equidigital number, since it uses as much as digits as its factorization.

2501999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 2501999 is about 1581.7708430743. The cubic root of 2501999 is about 135.7570453312.

The spelling of 2501999 in words is "two million, five hundred one thousand, nine hundred ninety-nine".