2257987 has 2 divisors, whose sum is σ = 2257988. Its totient is φ = 2257986.

The previous prime is 2257961. The next prime is 2258023. The reversal of 2257987 is 7897522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2257987 - 2⁷ = 2257859 is a prime.

2257987 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2257187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128993 + 1128994.

It is an arithmetic number, because the mean of its divisors is an integer number (1128994).

2^2257987 is an apocalyptic number.

2257987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2257987 is an equidigital number, since it uses as much as digits as its factorization.

2257987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 40.

The square root of 2257987 is about 1502.6599748446. The cubic root of 2257987 is about 131.1919374321.

The spelling of 2257987 in words is "two million, two hundred fifty-seven thousand, nine hundred eighty-seven".