1801276 has 24 divisors (see below), whose sum is σ = 3361680. Its totient is φ = 842112.

The previous prime is 1801273. The next prime is 1801297. The reversal of 1801276 is 6721081.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1801276.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10326 + ... + 10498.

It is an arithmetic number, because the mean of its divisors is an integer number (140070).

2^1801276 is an apocalyptic number.

1801276 is the 1096-th pentagonal number.

It is an amenable number.

1801276 is a deficient number, since it is larger than the sum of its proper divisors (1560404).

1801276 is a wasteful number, since it uses less digits than its factorization.

1801276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1801276 is about 1342.1162393772. The cubic root of 1801276 is about 121.6727771581.

The spelling of 1801276 in words is "one million, eight hundred one thousand, two hundred seventy-six".