2257939 has 2 divisors, whose sum is σ = 2257940. Its totient is φ = 2257938.

The previous prime is 2257909. The next prime is 2257943. The reversal of 2257939 is 9397522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2257939 - 2¹³ = 2249747 is a prime.

It is a d-powerful number, because it can be written as 2 + 2²¹ + 5⁷ + 7⁵ + 9⁴ + 3⁵ + 9⁵ .

It is a junction number, because it is equal to n+sod(n) for n = 2257898 and 2257907.

It is not a weakly prime, because it can be changed into another prime (2257909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128969 + 1128970.

It is an arithmetic number, because the mean of its divisors is an integer number (1128970).

2^2257939 is an apocalyptic number.

2257939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2257939 is an equidigital number, since it uses as much as digits as its factorization.

2257939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 37.

The square root of 2257939 is about 1502.6440030826. The cubic root of 2257939 is about 131.1910078050.

The spelling of 2257939 in words is "two million, two hundred fifty-seven thousand, nine hundred thirty-nine".