1909242 has 24 divisors (see below), whose sum is σ = 4196244. Its totient is φ = 627264.

The previous prime is 1909241. The next prime is 1909267. The reversal of 1909242 is 2429091.

It can be written as a sum of positive squares in 2 ways, for example, as 1687401 + 221841 = 1299^2 + 471^2 .

It is not an unprimeable number, because it can be changed into a prime (1909241) 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, 588 + ... + 2040.

2^1909242 is an apocalyptic number.

1909242 is an abundant number, since it is smaller than the sum of its proper divisors (2287002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1909242 is a wasteful number, since it uses less digits than its factorization.

1909242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534 (or 1531 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1909242 is about 1381.7532341196. The cubic root of 1909242 is about 124.0567291590.

The spelling of 1909242 in words is "one million, nine hundred nine thousand, two hundred forty-two".