1852009 has 2 divisors, whose sum is σ = 1852010. Its totient is φ = 1852008.

The previous prime is 1852003. The next prime is 1852013. The reversal of 1852009 is 9002581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1488400 + 363609 = 1220^2 + 603^2 .

It is a cyclic number.

It is not a de Polignac number, because 1852009 - 2¹⁷ = 1720937 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1852003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 926004 + 926005.

It is an arithmetic number, because the mean of its divisors is an integer number (926005).

2^1852009 is an apocalyptic number.

It is an amenable number.

1852009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1852009 is an equidigital number, since it uses as much as digits as its factorization.

1852009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1852009 is about 1360.8853735712. The cubic root of 1852009 is about 122.8045234888.

The spelling of 1852009 in words is "one million, eight hundred fifty-two thousand, nine".