1225961 has 8 divisors (see below), whose sum is σ = 1360800. Its totient is φ = 1095040.

The previous prime is 1225949. The next prime is 1225963. The reversal of 1225961 is 1695221.

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

It is not a de Polignac number, because 1225961 - 2⁶ = 1225897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225961.

It is not an unprimeable number, because it can be changed into a prime (1225963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296 + ... + 1593.

It is an arithmetic number, because the mean of its divisors is an integer number (170100).

2^1225961 is an apocalyptic number.

1225961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1225961 is a deficient number, since it is larger than the sum of its proper divisors (134839).

1225961 is a wasteful number, since it uses less digits than its factorization.

1225961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1959.

The product of its digits is 1080, while the sum is 26.

The square root of 1225961 is about 1107.2312314959. The cubic root of 1225961 is about 107.0267205517.

It can be divided in two parts, 1225 and 961, that multiplied together give a square (1177225 = 1085²).

The spelling of 1225961 in words is "one million, two hundred twenty-five thousand, nine hundred sixty-one".