1263945 has 8 divisors (see below), whose sum is σ = 2022336. Its totient is φ = 674096.

The previous prime is 1263943. The next prime is 1263947. The reversal of 1263945 is 5493621.

It is an interprime number because it is at equal distance from previous prime (1263943) and next prime (1263947).

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

It is a cyclic number.

It is not a de Polignac number, because 1263945 - 2¹ = 1263943 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1263943) 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, 42117 + ... + 42146.

It is an arithmetic number, because the mean of its divisors is an integer number (252792).

2^1263945 is an apocalyptic number.

1263945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1263945 is a deficient number, since it is larger than the sum of its proper divisors (758391).

1263945 is an equidigital number, since it uses as much as digits as its factorization.

1263945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84271.

The product of its digits is 6480, while the sum is 30.

The square root of 1263945 is about 1124.2530853860. The cubic root of 1263945 is about 108.1208352612.

The spelling of 1263945 in words is "one million, two hundred sixty-three thousand, nine hundred forty-five".