1263971 has 4 divisors (see below), whose sum is σ = 1290912. Its totient is φ = 1237032.

The previous prime is 1263961. The next prime is 1263973. The reversal of 1263971 is 1793621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1263973) 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, 13400 + ... + 13493.

It is an arithmetic number, because the mean of its divisors is an integer number (322728).

2^1263971 is an apocalyptic number.

1263971 is a deficient number, since it is larger than the sum of its proper divisors (26941).

1263971 is an equidigital number, since it uses as much as digits as its factorization.

1263971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26940.

The product of its digits is 2268, while the sum is 29.

The square root of 1263971 is about 1124.2646485592. The cubic root of 1263971 is about 108.1215766232.

The spelling of 1263971 in words is "one million, two hundred sixty-three thousand, nine hundred seventy-one".