1225951 has 4 divisors (see below), whose sum is σ = 1229832. Its totient is φ = 1222072.

The previous prime is 1225949. The next prime is 1225963. The reversal of 1225951 is 1595221.

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

It is a cyclic number.

It is not a de Polignac number, because 1225951 - 2¹ = 1225949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1420 + ... + 2113.

It is an arithmetic number, because the mean of its divisors is an integer number (307458).

2^1225951 is an apocalyptic number.

1225951 is a deficient number, since it is larger than the sum of its proper divisors (3881).

1225951 is an equidigital number, since it uses as much as digits as its factorization.

1225951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880.

The product of its digits is 900, while the sum is 25.

The square root of 1225951 is about 1107.2267157181. The cubic root of 1225951 is about 107.0264295501.

The spelling of 1225951 in words is "one million, two hundred twenty-five thousand, nine hundred fifty-one".