1909485 has 12 divisors (see below), whose sum is σ = 3309852. Its totient is φ = 1018368.

The previous prime is 1909477. The next prime is 1909487. The reversal of 1909485 is 5849091.

It can be written as a sum of positive squares in 2 ways, for example, as 887364 + 1022121 = 942^2 + 1011^2 .

It is not a de Polignac number, because 1909485 - 2³ = 1909477 is a prime.

It is a super-2 number, since 2×1909485² = 7292265930450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1909487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21172 + ... + 21261.

It is an arithmetic number, because the mean of its divisors is an integer number (275821).

2^1909485 is an apocalyptic number.

1909485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1909485 is a deficient number, since it is larger than the sum of its proper divisors (1400367).

1909485 is a wasteful number, since it uses less digits than its factorization.

1909485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42444 (or 42441 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1909485 is about 1381.8411630864. The cubic root of 1909485 is about 124.0619920690.

The spelling of 1909485 in words is "one million, nine hundred nine thousand, four hundred eighty-five".