1235257 has 4 divisors (see below), whose sum is σ = 1275136. Its totient is φ = 1195380.

The previous prime is 1235251. The next prime is 1235263. The reversal of 1235257 is 7525321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7525321 = 139 ⋅54139.

It is an interprime number because it is at equal distance from previous prime (1235251) and next prime (1235263).

It is a cyclic number.

It is not a de Polignac number, because 1235257 - 2³ = 1235249 is a prime.

It is a d-powerful number, because it can be written as 1 + 2⁸ + 3⁹ + 5³ + 2¹⁰ + 5⁸ + 7⁷ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1235251) 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, 19893 + ... + 19954.

It is an arithmetic number, because the mean of its divisors is an integer number (318784).

2^1235257 is an apocalyptic number.

It is an amenable number.

1235257 is a deficient number, since it is larger than the sum of its proper divisors (39879).

1235257 is an equidigital number, since it uses as much as digits as its factorization.

1235257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39878.

The product of its digits is 2100, while the sum is 25.

The square root of 1235257 is about 1111.4211622963. The cubic root of 1235257 is about 107.2965541034.

Subtracting 1235257 from its reverse (7525321), we obtain a square (6290064 = 2508²).

The spelling of 1235257 in words is "one million, two hundred thirty-five thousand, two hundred fifty-seven".