1257023 has 4 divisors (see below), whose sum is σ = 1270080. Its totient is φ = 1243968.

The previous prime is 1257017. The next prime is 1257029. The reversal of 1257023 is 3207521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3207521 = 751 ⋅4271.

It is an interprime number because it is at equal distance from previous prime (1257017) and next prime (1257029).

It is a cyclic number.

It is not a de Polignac number, because 1257023 - 2¹⁸ = 994879 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1256986 and 1257004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6383 + ... + 6576.

It is an arithmetic number, because the mean of its divisors is an integer number (317520).

2^1257023 is an apocalyptic number.

1257023 is a deficient number, since it is larger than the sum of its proper divisors (13057).

1257023 is an equidigital number, since it uses as much as digits as its factorization.

1257023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13056.

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

The square root of 1257023 is about 1121.1703706395. The cubic root of 1257023 is about 107.9230991198.

The spelling of 1257023 in words is "one million, two hundred fifty-seven thousand, twenty-three".