1225841 has 4 divisors (see below), whose sum is σ = 1234800. Its totient is φ = 1216884.

The previous prime is 1225817. The next prime is 1225849. The reversal of 1225841 is 1485221.

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 1225841 - 2¹⁴ = 1209457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225849) 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, 4271 + ... + 4548.

It is an arithmetic number, because the mean of its divisors is an integer number (308700).

2^1225841 is an apocalyptic number.

It is an amenable number.

1225841 is a deficient number, since it is larger than the sum of its proper divisors (8959).

1225841 is an equidigital number, since it uses as much as digits as its factorization.

1225841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8958.

The product of its digits is 640, while the sum is 23.

The square root of 1225841 is about 1107.1770409469. The cubic root of 1225841 is about 107.0232284272.

It can be divided in two parts, 1225 and 841, that multiplied together give a square (1030225 = 1015²).

The spelling of 1225841 in words is "one million, two hundred twenty-five thousand, eight hundred forty-one".