1263481 has 4 divisors (see below), whose sum is σ = 1330000. Its totient is φ = 1196964.

The previous prime is 1263473. The next prime is 1263487. The reversal of 1263481 is 1843621.

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.

It is a cyclic number.

It is not a de Polignac number, because 1263481 - 2³ = 1263473 is a prime.

It is a super-2 number, since 2×1263481² = 3192768474722, which contains 22 as substring.

It is an Ulam number.

1263481 is a lucky number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1263487) 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, 33231 + ... + 33268.

It is an arithmetic number, because the mean of its divisors is an integer number (332500).

2^1263481 is an apocalyptic number.

It is an amenable number.

1263481 is a deficient number, since it is larger than the sum of its proper divisors (66519).

1263481 is an equidigital number, since it uses as much as digits as its factorization.

1263481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66518.

The product of its digits is 1152, while the sum is 25.

The square root of 1263481 is about 1124.0467072146. The cubic root of 1263481 is about 108.1076030905.

The spelling of 1263481 in words is "one million, two hundred sixty-three thousand, four hundred eighty-one".