1225671 has 8 divisors (see below), whose sum is σ = 1720320. Its totient is φ = 774072.

The previous prime is 1225663. The next prime is 1225687. The reversal of 1225671 is 1765221.

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

It is not a de Polignac number, because 1225671 - 2³ = 1225663 is a prime.

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.

1225671 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225621) 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, 10695 + ... + 10808.

It is an arithmetic number, because the mean of its divisors is an integer number (215040).

2^1225671 is an apocalyptic number.

1225671 is a deficient number, since it is larger than the sum of its proper divisors (494649).

1225671 is a wasteful number, since it uses less digits than its factorization.

1225671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21525.

The product of its digits is 840, while the sum is 24.

The square root of 1225671 is about 1107.1002664619. The cubic root of 1225671 is about 107.0182808606.

The spelling of 1225671 in words is "one million, two hundred twenty-five thousand, six hundred seventy-one".