1265423 has 4 divisors (see below), whose sum is σ = 1271088. Its totient is φ = 1259760.

The previous prime is 1265393. The next prime is 1265431. The reversal of 1265423 is 3245621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3245621 = 1447 ⋅2243.

It is a cyclic number.

It is not a de Polignac number, because 1265423 - 2⁸ = 1265167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265443) 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, 2483 + ... + 2948.

It is an arithmetic number, because the mean of its divisors is an integer number (317772).

2^1265423 is an apocalyptic number.

1265423 is a deficient number, since it is larger than the sum of its proper divisors (5665).

1265423 is an equidigital number, since it uses as much as digits as its factorization.

1265423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5664.

The product of its digits is 1440, while the sum is 23.

The square root of 1265423 is about 1124.9102186397. The cubic root of 1265423 is about 108.1629627130.

It can be divided in two parts, 1265 and 423, that multiplied together give a triangular number (535095 = T₁₀₃₄).

The spelling of 1265423 in words is "one million, two hundred sixty-five thousand, four hundred twenty-three".