1842021225 has 36 divisors (see below), whose sum is σ = 3599202672. Its totient is φ = 893100000.

The previous prime is 1842021221. The next prime is 1842021239. The reversal of 1842021225 is 5221202481.

1842021225 is a `hidden beast` number, since 1 + 8 + 420 + 212 + 25 = 666.

1842021225 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1842021225 - 2² = 1842021221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1842021221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 369651 + ... + 374600.

It is an arithmetic number, because the mean of its divisors is an integer number (99977852).

Almost surely, 2^1842021225 is an apocalyptic number.

1842021225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1842021225 is a deficient number, since it is larger than the sum of its proper divisors (1757181447).

1842021225 is a wasteful number, since it uses less digits than its factorization.

1842021225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744278 (or 744270 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 1842021225 is about 42918.7747378697. The cubic root of 1842021225 is about 1225.8336627115.

The spelling of 1842021225 in words is "one billion, eight hundred forty-two million, twenty-one thousand, two hundred twenty-five".