2056357 has 2 divisors, whose sum is σ = 2056358. Its totient is φ = 2056356.

The previous prime is 2056343. The next prime is 2056363. The reversal of 2056357 is 7536502.

It is a Cunningham number, because it is equal to 1434²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2056356 + 1 = 1434^2 + 1^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2056357 is a prime.

It is a super-2 number, since 2×2056357² = 8457208222898, which contains 22 as substring.

It is a Chen prime.

2056357 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2056157) 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, 1028178 + 1028179.

It is an arithmetic number, because the mean of its divisors is an integer number (1028179).

2^2056357 is an apocalyptic number.

It is an amenable number.

2056357 is a deficient number, since it is larger than the sum of its proper divisors (1).

2056357 is an equidigital number, since it uses as much as digits as its factorization.

2056357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 2056357 is about 1434.0003486750. Note that the first 3 decimals coincide. The cubic root of 2056357 is about 127.1645829497.

The spelling of 2056357 in words is "two million, fifty-six thousand, three hundred fifty-seven".