2078257 has 4 divisors (see below), whose sum is σ = 2168640. Its totient is φ = 1987876.

The previous prime is 2078243. The next prime is 2078287. The reversal of 2078257 is 7528702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7528702 = 2 ⋅3764351.

It is a cyclic number.

It is not a de Polignac number, because 2078257 - 2¹¹ = 2076209 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2078207) 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 in 3 ways as a sum of consecutive naturals, for example, 45157 + ... + 45202.

It is an arithmetic number, because the mean of its divisors is an integer number (542160).

2^2078257 is an apocalyptic number.

It is an amenable number.

2078257 is a deficient number, since it is larger than the sum of its proper divisors (90383).

2078257 is an equidigital number, since it uses as much as digits as its factorization.

2078257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90382.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 2078257 is about 1441.6161070132. The cubic root of 2078257 is about 127.6144199071.

It can be divided in two parts, 207 and 8257, that added together give a square (8464 = 92²).

The spelling of 2078257 in words is "two million, seventy-eight thousand, two hundred fifty-seven".