1209925 has 6 divisors (see below), whose sum is σ = 1500338. Its totient is φ = 967920.

The previous prime is 1209889. The next prime is 1209931. The reversal of 1209925 is 5299021.

It can be written as a sum of positive squares in 3 ways, for example, as 191844 + 1018081 = 438^2 + 1009^2 .

It is not a de Polignac number, because 1209925 - 2¹⁵ = 1177157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1209893 and 1209902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24174 + ... + 24223.

2^1209925 is an apocalyptic number.

It is an amenable number.

1209925 is a deficient number, since it is larger than the sum of its proper divisors (290413).

1209925 is an equidigital number, since it uses as much as digits as its factorization.

1209925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48407 (or 48402 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 1209925 is about 1099.9659085626. The cubic root of 1209925 is about 106.5580219737.

The spelling of 1209925 in words is "one million, two hundred nine thousand, nine hundred twenty-five".