1057387 has 2 divisors, whose sum is σ = 1057388. Its totient is φ = 1057386.

The previous prime is 1057367. The next prime is 1057391. The reversal of 1057387 is 7837501.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1057387 is a prime.

It is a super-2 number, since 2×1057387² = 2236134535538, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1057307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528693 + 528694.

It is an arithmetic number, because the mean of its divisors is an integer number (528694).

2^1057387 is an apocalyptic number.

1057387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1057387 is an equidigital number, since it uses as much as digits as its factorization.

1057387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 1057387 is about 1028.2932461122. The cubic root of 1057387 is about 101.8774319115.

It can be divided in two parts, 1057 and 387, that added together give a square (1444 = 38²).

The spelling of 1057387 in words is "one million, fifty-seven thousand, three hundred eighty-seven".