1381057 has 2 divisors, whose sum is σ = 1381058. Its totient is φ = 1381056.

The previous prime is 1381043. The next prime is 1381069. The reversal of 1381057 is 7501831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1062961 + 318096 = 1031^2 + 564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1381057 is a prime.

1381057 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1381027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690528 + 690529.

It is an arithmetic number, because the mean of its divisors is an integer number (690529).

2^1381057 is an apocalyptic number.

It is an amenable number.

1381057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381057 is an equidigital number, since it uses as much as digits as its factorization.

1381057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 1381057 is about 1175.1838154093. The cubic root of 1381057 is about 111.3620459329.

Adding to 1381057 its reverse (7501831), we get a palindrome (8882888).

The spelling of 1381057 in words is "one million, three hundred eighty-one thousand, fifty-seven".