1802945042 has 4 divisors (see below), whose sum is σ = 2704417566. Its totient is φ = 901472520.

The previous prime is 1802944981. The next prime is 1802945059. The reversal of 1802945042 is 2405492081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1660644001 + 142301041 = 40751^2 + 11929^2 .

It is a super-2 number, since 2×1802945042² = 6501221648944763528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1802944993 and 1802945011.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450736259 + ... + 450736262.

Almost surely, 2^1802945042 is an apocalyptic number.

1802945042 is a deficient number, since it is larger than the sum of its proper divisors (901472524).

1802945042 is an equidigital number, since it uses as much as digits as its factorization.

1802945042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901472523.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 1802945042 is about 42461.1003390162. The cubic root of 1802945042 is about 1217.1034576406.

The spelling of 1802945042 in words is "one billion, eight hundred two million, nine hundred forty-five thousand, forty-two".