1225001 has 4 divisors (see below), whose sum is σ = 1227600. Its totient is φ = 1222404.

The previous prime is 1224991. The next prime is 1225009. The reversal of 1225001 is 1005221.

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 1225001 - 2¹⁰ = 1223977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1225009) 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, 371 + ... + 1608.

It is an arithmetic number, because the mean of its divisors is an integer number (306900).

2^1225001 is an apocalyptic number.

It is an amenable number.

1225001 is a deficient number, since it is larger than the sum of its proper divisors (2599).

1225001 is an equidigital number, since it uses as much as digits as its factorization.

1225001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2598.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1225001 is about 1106.7976328128. The cubic root of 1225001 is about 106.9987771718.

The spelling of 1225001 in words is "one million, two hundred twenty-five thousand, one".