1257107 has 4 divisors (see below), whose sum is σ = 1280880. Its totient is φ = 1233336.

The previous prime is 1257103. The next prime is 1257119. The reversal of 1257107 is 7017521.

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: 7017521 = 7 ⋅1002503.

It is a cyclic number.

It is not a de Polignac number, because 1257107 - 2² = 1257103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1257103) 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 in 3 ways as a sum of consecutive naturals, for example, 11807 + ... + 11912.

It is an arithmetic number, because the mean of its divisors is an integer number (320220).

2^1257107 is an apocalyptic number.

1257107 is a deficient number, since it is larger than the sum of its proper divisors (23773).

1257107 is an equidigital number, since it uses as much as digits as its factorization.

1257107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23772.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 1257107 is about 1121.2078308681. The cubic root of 1257107 is about 107.9255030372.

The spelling of 1257107 in words is "one million, two hundred fifty-seven thousand, one hundred seven".