1225011 has 4 divisors (see below), whose sum is σ = 1633352. Its totient is φ = 816672.

The previous prime is 1225009. The next prime is 1225019. The reversal of 1225011 is 1105221.

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

It is not a de Polignac number, because 1225011 - 2¹ = 1225009 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225019) 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, 204166 + ... + 204171.

It is an arithmetic number, because the mean of its divisors is an integer number (408338).

2^1225011 is an apocalyptic number.

1225011 is a deficient number, since it is larger than the sum of its proper divisors (408341).

1225011 is an equidigital number, since it uses as much as digits as its factorization.

1225011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408340.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 1225011 is about 1106.8021503412. The cubic root of 1225011 is about 106.9990683239. Note that the first 3 decimals are identical.

The spelling of 1225011 in words is "one million, two hundred twenty-five thousand, eleven".