1370257 has 4 divisors (see below), whose sum is σ = 1566016. Its totient is φ = 1174500.

The previous prime is 1370227. The next prime is 1370263. The reversal of 1370257 is 7520731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1370257 - 2¹⁵ = 1337489 is a prime.

It is a Duffinian number.

1370257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1370227) 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, 97869 + ... + 97882.

It is an arithmetic number, because the mean of its divisors is an integer number (391504).

2^1370257 is an apocalyptic number.

It is an amenable number.

1370257 is a deficient number, since it is larger than the sum of its proper divisors (195759).

1370257 is an equidigital number, since it uses as much as digits as its factorization.

1370257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195758.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 1370257 is about 1170.5797708828. The cubic root of 1370257 is about 111.0709985947.

Adding to 1370257 its reverse (7520731), we get a palindrome (8890988).

The spelling of 1370257 in words is "one million, three hundred seventy thousand, two hundred fifty-seven".