1812722 has 16 divisors (see below), whose sum is σ = 2866752. Its totient is φ = 858000.

The previous prime is 1812721. The next prime is 1812749. The reversal of 1812722 is 2272181.

It is a super-2 number, since 2×1812722² = 6571922098568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (1812721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7097 + ... + 7347.

It is an arithmetic number, because the mean of its divisors is an integer number (179172).

2^1812722 is an apocalyptic number.

1812722 is a deficient number, since it is larger than the sum of its proper divisors (1054030).

1812722 is a wasteful number, since it uses less digits than its factorization.

1812722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433.

The product of its digits is 448, while the sum is 23.

The square root of 1812722 is about 1346.3736479893. The cubic root of 1812722 is about 121.9299517260.

The spelling of 1812722 in words is "one million, eight hundred twelve thousand, seven hundred twenty-two".