1263381 has 8 divisors (see below), whose sum is σ = 1925184. Its totient is φ = 721920.

The previous prime is 1263377. The next prime is 1263391. The reversal of 1263381 is 1833621.

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

It is not a de Polignac number, because 1263381 - 2² = 1263377 is a prime.

It is a super-2 number, since 2×1263381² = 3192263102322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30060 + ... + 30101.

It is an arithmetic number, because the mean of its divisors is an integer number (240648).

2^1263381 is an apocalyptic number.

It is an amenable number.

1263381 is a deficient number, since it is larger than the sum of its proper divisors (661803).

1263381 is an equidigital number, since it uses as much as digits as its factorization.

1263381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60171.

The product of its digits is 864, while the sum is 24.

The square root of 1263381 is about 1124.0022241971. The cubic root of 1263381 is about 108.1047509053.

The spelling of 1263381 in words is "one million, two hundred sixty-three thousand, three hundred eighty-one".