1801426 has 8 divisors (see below), whose sum is σ = 2947824. Its totient is φ = 818820.

The previous prime is 1801411. The next prime is 1801433. The reversal of 1801426 is 6241081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 81883 = 1801426 / (1 + 8 + 0 + 1 + 4 + 2 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 1801397 and 1801406.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 40920 + ... + 40963.

It is an arithmetic number, because the mean of its divisors is an integer number (368478).

2^1801426 is an apocalyptic number.

1801426 is a deficient number, since it is larger than the sum of its proper divisors (1146398).

1801426 is a wasteful number, since it uses less digits than its factorization.

1801426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81896.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1801426 is about 1342.1721201098. The cubic root of 1801426 is about 121.6761544695.

The spelling of 1801426 in words is "one million, eight hundred one thousand, four hundred twenty-six".