1812626 has 4 divisors (see below), whose sum is σ = 2718942. Its totient is φ = 906312.

The previous prime is 1812623. The next prime is 1812661. The reversal of 1812626 is 6262181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6262181 = 577 ⋅10853.

It can be written as a sum of positive squares in only one way, i.e., 912025 + 900601 = 955^2 + 949^2 .

It is a super-2 number, since 2×1812626² = 6571226031752, which contains 22 as substring.

It is a d-powerful number, because it can be written as 1 + 8³ + 1 + 2⁷ + 6⁴ + 2¹⁷ + 6⁸ .

It is a junction number, because it is equal to n+sod(n) for n = 1812595 and 1812604.

It is not an unprimeable number, because it can be changed into a prime (1812623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453155 + ... + 453158.

2^1812626 is an apocalyptic number.

1812626 is a deficient number, since it is larger than the sum of its proper divisors (906316).

1812626 is an equidigital number, since it uses as much as digits as its factorization.

1812626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906315.

The product of its digits is 1152, while the sum is 26.

The square root of 1812626 is about 1346.3379961956. The cubic root of 1812626 is about 121.9277992573.

The spelling of 1812626 in words is "one million, eight hundred twelve thousand, six hundred twenty-six".