1842690121 has 4 divisors (see below), whose sum is σ = 1859911632. Its totient is φ = 1825468612.

The previous prime is 1842690107. The next prime is 1842690181. The reversal of 1842690121 is 1210962481.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1842690121 - 2¹⁹ = 1842165833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1842690181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8610595 + ... + 8610808.

It is an arithmetic number, because the mean of its divisors is an integer number (464977908).

Almost surely, 2^1842690121 is an apocalyptic number.

It is an amenable number.

1842690121 is a deficient number, since it is larger than the sum of its proper divisors (17221511).

1842690121 is a wasteful number, since it uses less digits than its factorization.

1842690121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17221510.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 1842690121 is about 42926.5666108996. The cubic root of 1842690121 is about 1225.9820243757.

The spelling of 1842690121 in words is "one billion, eight hundred forty-two million, six hundred ninety thousand, one hundred twenty-one".