1899742 has 16 divisors (see below), whose sum is σ = 3169152. Its totient is φ = 848160.

The previous prime is 1899721. The next prime is 1899757. The reversal of 1899742 is 2479981.

It is a junction number, because it is equal to n+sod(n) for n = 1899695 and 1899704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373 + ... + 1984.

It is an arithmetic number, because the mean of its divisors is an integer number (198072).

2^1899742 is an apocalyptic number.

1899742 is a deficient number, since it is larger than the sum of its proper divisors (1269410).

1899742 is a wasteful number, since it uses less digits than its factorization.

1899742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403.

The product of its digits is 36288, while the sum is 40.

The square root of 1899742 is about 1378.3112855955. The cubic root of 1899742 is about 123.8506265850.

The spelling of 1899742 in words is "one million, eight hundred ninety-nine thousand, seven hundred forty-two".