1425209 has 4 divisors (see below), whose sum is σ = 1500240. Its totient is φ = 1350180.

The previous prime is 1425199. The next prime is 1425217. The reversal of 1425209 is 9025241.

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 1425209 - 2¹² = 1421113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1425299) 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, 37487 + ... + 37524.

It is an arithmetic number, because the mean of its divisors is an integer number (375060).

2^1425209 is an apocalyptic number.

1425209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1425209 is a deficient number, since it is larger than the sum of its proper divisors (75031).

1425209 is an equidigital number, since it uses as much as digits as its factorization.

1425209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75030.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1425209 is about 1193.8211758886. The cubic root of 1425209 is about 112.5363569734.

The spelling of 1425209 in words is "one million, four hundred twenty-five thousand, two hundred nine".