1340057 has 4 divisors (see below), whose sum is σ = 1343076. Its totient is φ = 1337040.

The previous prime is 1340047. The next prime is 1340069. The reversal of 1340057 is 7500431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7500431 = 997 ⋅7523.

It can be written as a sum of positive squares in 2 ways, for example, as 602176 + 737881 = 776^2 + 859^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340057 - 2⁴ = 1340041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698 + ... + 1779.

It is an arithmetic number, because the mean of its divisors is an integer number (335769).

2^1340057 is an apocalyptic number.

It is an amenable number.

1340057 is a deficient number, since it is larger than the sum of its proper divisors (3019).

1340057 is an equidigital number, since it uses as much as digits as its factorization.

1340057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3018.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 1340057 is about 1157.6083102673. The cubic root of 1340057 is about 110.2489403319.

Adding to 1340057 its reverse (7500431), we get a palindrome (8840488).

The spelling of 1340057 in words is "one million, three hundred forty thousand, fifty-seven".