1263397 has 4 divisors (see below), whose sum is σ = 1268236. Its totient is φ = 1258560.

The previous prime is 1263391. The next prime is 1263403. The reversal of 1263397 is 7933621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7933621 = 19 ⋅417559.

It is an interprime number because it is at equal distance from previous prime (1263391) and next prime (1263403).

It can be written as a sum of positive squares in 2 ways, for example, as 314721 + 948676 = 561^2 + 974^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263397 - 2¹⁵ = 1230629 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 (1263391) 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, 2004 + ... + 2557.

It is an arithmetic number, because the mean of its divisors is an integer number (317059).

2^1263397 is an apocalyptic number.

It is an amenable number.

1263397 is a deficient number, since it is larger than the sum of its proper divisors (4839).

1263397 is an equidigital number, since it uses as much as digits as its factorization.

1263397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4838.

The product of its digits is 6804, while the sum is 31.

The square root of 1263397 is about 1124.0093415982. The cubic root of 1263397 is about 108.1052072651.

The spelling of 1263397 in words is "one million, two hundred sixty-three thousand, three hundred ninety-seven".