1263398 has 8 divisors (see below), whose sum is σ = 1913808. Its totient is φ = 625464.

The previous prime is 1263391. The next prime is 1263403. The reversal of 1263398 is 8933621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam 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, 2861 + ... + 3272.

It is an arithmetic number, because the mean of its divisors is an integer number (239226).

2^1263398 is an apocalyptic number.

1263398 is a deficient number, since it is larger than the sum of its proper divisors (650410).

1263398 is a wasteful number, since it uses less digits than its factorization.

1263398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6238.

The product of its digits is 7776, while the sum is 32.

The square root of 1263398 is about 1124.0097864343. The cubic root of 1263398 is about 108.1052357874.

It can be divided in two parts, 1263 and 398, that added together give a palindrome (1661).

The spelling of 1263398 in words is "one million, two hundred sixty-three thousand, three hundred ninety-eight".