1865057 has 2 divisors, whose sum is σ = 1865058. Its totient is φ = 1865056.

The previous prime is 1865027. The next prime is 1865063. The reversal of 1865057 is 7505681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1157776 + 707281 = 1076^2 + 841^2 .

It is an emirp because it is prime and its reverse (7505681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1865057 - 2⁸ = 1864801 is a prime.

It is a super-2 number, since 2×1865057² = 6956875226498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1865027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932528 + 932529.

It is an arithmetic number, because the mean of its divisors is an integer number (932529).

2^1865057 is an apocalyptic number.

It is an amenable number.

1865057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1865057 is an equidigital number, since it uses as much as digits as its factorization.

1865057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 1865057 is about 1365.6708973981. The cubic root of 1865057 is about 123.0922479816.

The spelling of 1865057 in words is "one million, eight hundred sixty-five thousand, fifty-seven".