1801320242 has 6 divisors (see below), whose sum is σ = 2702070399. Its totient is φ = 900630110.

The previous prime is 1801320163. The next prime is 1801320263. The reversal of 1801320242 is 2420231081.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 900660121 + 900660121 = 30011^2 + 30011^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=30011.

It is a super-2 number, since 2×1801320242² = 6489509228477877128, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 45017 + ... + 75027.

Almost surely, 2^1801320242 is an apocalyptic number.

1801320242 is a deficient number, since it is larger than the sum of its proper divisors (900750157).

1801320242 is an frugal number, since it uses more digits than its factorization.

1801320242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60024 (or 30013 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1801320242 is about 42441.9632203790. The cubic root of 1801320242 is about 1216.7377330437.

The spelling of 1801320242 in words is "one billion, eight hundred one million, three hundred twenty thousand, two hundred forty-two".