1223971 has 6 divisors (see below), whose sum is σ = 1423860. Its totient is φ = 1049076.

The previous prime is 1223953. The next prime is 1223977. The reversal of 1223971 is 1793221.

It is not a de Polignac number, because 1223971 - 2⁵ = 1223939 is a prime.

It is a Duffinian number.

1223971 is a lucky number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1223977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12441 + ... + 12538.

It is an arithmetic number, because the mean of its divisors is an integer number (237310).

2^1223971 is an apocalyptic number.

1223971 is a deficient number, since it is larger than the sum of its proper divisors (199889).

1223971 is an equidigital number, since it uses as much as digits as its factorization.

1223971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24993 (or 24986 counting only the distinct ones).

The product of its digits is 756, while the sum is 25.

The square root of 1223971 is about 1106.3322285824. The cubic root of 1223971 is about 106.9687800144.

The spelling of 1223971 in words is "one million, two hundred twenty-three thousand, nine hundred seventy-one".